WebGLRenderer: Integrate PMREM. (#22178)

* WebGLRenderer: Integrate PMREM

* Examples: Update screenshot.

examples/jsm/postprocessing/CubeTexturePass.js

@@ -61,7 +61,7 @@ class CubeTexturePass extends Pass {
 		this.cubeCamera.quaternion.setFromRotationMatrix( this.camera.matrixWorld );
 
 		this.cubeMesh.material.uniforms.envMap.value = this.envMap;
-		this.cubeMesh.material.uniforms.flipEnvMap.value = ( this.envMap.isCubeTexture && this.envMap._needsFlipEnvMap ) ? - 1 : 1;
+		this.cubeMesh.material.uniforms.flipEnvMap.value = ( this.envMap.isCubeTexture && this.envMap.isRenderTargetTexture === false ) ? - 1 : 1;
 		this.cubeMesh.material.uniforms.opacity.value = this.opacity;
 		this.cubeMesh.material.transparent = ( this.opacity < 1.0 );
 

examples/webgl_loader_gltf.html

@@ -40,17 +40,14 @@
 				scene = new THREE.Scene();
 
 				new RGBELoader()
-					.setDataType( THREE.UnsignedByteType )
+					.setDataType( THREE.FloatType )
 					.setPath( 'textures/equirectangular/' )
 					.load( 'royal_esplanade_1k.hdr', function ( texture ) {
 
-						const envMap = pmremGenerator.fromEquirectangular( texture ).texture;
+						texture.mapping = THREE.EquirectangularReflectionMapping;
 
-						scene.background = envMap;
-						scene.environment = envMap;
-
-						texture.dispose();
-						pmremGenerator.dispose();
+						scene.background = texture;
+						scene.environment = texture;
 
 						render();
 
@@ -90,9 +87,6 @@
 				renderer.outputEncoding = THREE.sRGBEncoding;
 				container.appendChild( renderer.domElement );
 
-				const pmremGenerator = new THREE.PMREMGenerator( renderer );
-				pmremGenerator.compileEquirectangularShader();
-
 				const controls = new OrbitControls( camera, renderer.domElement );
 				controls.addEventListener( 'change', render ); // use if there is no animation loop
 				controls.minDistance = 2;

examples/webgl_loader_gltf_extensions.html

@@ -158,14 +158,14 @@
 				// Load background and generate envMap
 
 				new RGBELoader()
-					.setDataType( THREE.UnsignedByteType )
+					.setDataType( THREE.FloatType )
 					.setPath( 'textures/equirectangular/' )
 					.load( 'venice_sunset_1k.hdr', function ( texture ) {
 
-						envMap = pmremGenerator.fromEquirectangular( texture ).texture;
-						pmremGenerator.dispose();
+						texture.mapping = THREE.EquirectangularReflectionMapping;
 
-						background = envMap;
+						envMap = texture;
+						background = texture;
 
 						//
 
@@ -175,9 +175,6 @@
 
 					} );
 
-				const pmremGenerator = new THREE.PMREMGenerator( renderer );
-				pmremGenerator.compileEquirectangularShader();
-
 			}
 
 			function initScene( sceneInfo ) {

examples/webgl_loader_gltf_transmission.html

@@ -40,17 +40,14 @@
 				scene = new THREE.Scene();
 
 				new RGBELoader()
-					.setDataType( THREE.UnsignedByteType )
+					.setDataType( THREE.FloatType )
 					.setPath( 'textures/equirectangular/' )
 					.load( 'quarry_01_1k.hdr', function ( texture ) {
 
-						const envMap = pmremGenerator.fromEquirectangular( texture ).texture;
+						texture.mapping = THREE.EquirectangularReflectionMapping;
 
-						scene.background = envMap;
-						scene.environment = envMap;
-
-						texture.dispose();
-						pmremGenerator.dispose();
+						scene.background = texture;
+						scene.environment = texture;
 
 						// model
 
@@ -73,9 +70,6 @@
 				renderer.outputEncoding = THREE.sRGBEncoding;
 				container.appendChild( renderer.domElement );
 
-				const pmremGenerator = new THREE.PMREMGenerator( renderer );
-				pmremGenerator.compileEquirectangularShader();
-
 				const controls = new OrbitControls( camera, renderer.domElement );
 				controls.minDistance = 0.5;
 				controls.maxDistance = 10;

examples/webgl_loader_gltf_variants.html

@@ -43,17 +43,14 @@
 				scene = new THREE.Scene();
 
 				new RGBELoader()
-					.setDataType( THREE.UnsignedByteType )
+					.setDataType( THREE.FloatType )
 					.setPath( 'textures/equirectangular/' )
 					.load( 'quarry_01_1k.hdr', function ( texture ) {
 
-						const envMap = pmremGenerator.fromEquirectangular( texture ).texture;
+						texture.mapping = THREE.EquirectangularReflectionMapping;
 
-						scene.background = envMap;
-						scene.environment = envMap;
-
-						texture.dispose();
-						pmremGenerator.dispose();
+						scene.background = texture;
+						scene.environment = texture;
 
 						render();
 
@@ -94,9 +91,6 @@
 				renderer.outputEncoding = THREE.sRGBEncoding;
 				container.appendChild( renderer.domElement );
 
-				const pmremGenerator = new THREE.PMREMGenerator( renderer );
-				pmremGenerator.compileEquirectangularShader();
-
 				const controls = new OrbitControls( camera, renderer.domElement );
 				controls.addEventListener( 'change', render ); // use if there is no animation loop
 				controls.minDistance = 2;

examples/webgl_materials_envmaps_exr.html

@@ -32,7 +32,6 @@
 			let container, stats;
 			let camera, scene, renderer, controls;
 			let torusMesh, planeMesh;
-			let pngCubeRenderTarget, exrCubeRenderTarget;
 			let pngBackground, exrBackground;
 
 			init();
@@ -70,38 +69,22 @@
 				planeMesh.rotation.x = - Math.PI * 0.5;
 				scene.add( planeMesh );
 
-				THREE.DefaultLoadingManager.onLoad = function ( ) {
+				new EXRLoader().load( 'textures/piz_compressed.exr', function ( texture ) {
 
-					pmremGenerator.dispose();
+					texture.mapping = THREE.EquirectangularReflectionMapping;
+					exrBackground = texture;
 
-				};
-
-				new EXRLoader()
-					.setDataType( THREE.UnsignedByteType )
-					.load( 'textures/piz_compressed.exr', function ( texture ) {
-
-						exrCubeRenderTarget = pmremGenerator.fromEquirectangular( texture );
-						exrBackground = exrCubeRenderTarget.texture;
-
-						texture.dispose();
-
-					} );
+				} );
 
 				new THREE.TextureLoader().load( 'textures/equirectangular.png', function ( texture ) {
 
+					texture.mapping = THREE.EquirectangularReflectionMapping;
 					texture.encoding = THREE.sRGBEncoding;
 
-					pngCubeRenderTarget = pmremGenerator.fromEquirectangular( texture );
-
-					pngBackground = pngCubeRenderTarget.texture;
-
-					texture.dispose();
+					pngBackground = texture;
 
 				} );
 
-				const pmremGenerator = new THREE.PMREMGenerator( renderer );
-				pmremGenerator.compileEquirectangularShader();
-
 				renderer.setPixelRatio( window.devicePixelRatio );
 				renderer.setSize( window.innerWidth, window.innerHeight );
 
@@ -163,11 +146,11 @@
 				switch ( params.envMap ) {
 
 					case 'EXR':
-						newEnvMap = exrCubeRenderTarget ? exrCubeRenderTarget.texture : null;
+						newEnvMap = exrBackground;
 						background = exrBackground;
 						break;
 					case 'PNG':
-						newEnvMap = pngCubeRenderTarget ? pngCubeRenderTarget.texture : null;
+						newEnvMap = pngBackground;
 						background = pngBackground;
 						break;
 

examples/webgl_materials_physical_clearcoat.html

@@ -46,31 +46,27 @@
 				scene.add( group );
 
 				new HDRCubeTextureLoader()
-					.setDataType( THREE.UnsignedByteType )
+					.setDataType( THREE.FloatType )
 					.setPath( 'textures/cube/pisaHDR/' )
 					.load( [ 'px.hdr', 'nx.hdr', 'py.hdr', 'ny.hdr', 'pz.hdr', 'nz.hdr' ],
-						function ( hdrCubeMap ) {
-
-							const hdrCubeRenderTarget = pmremGenerator.fromCubemap( hdrCubeMap );
-							hdrCubeMap.dispose();
-							pmremGenerator.dispose();
+						function ( texture ) {
 
 							const geometry = new THREE.SphereGeometry( 80, 64, 32 );
 
 							const textureLoader = new THREE.TextureLoader();
 
-							const diffuse = textureLoader.load( "textures/carbon/Carbon.png" );
+							const diffuse = textureLoader.load( 'textures/carbon/Carbon.png' );
 							diffuse.encoding = THREE.sRGBEncoding;
 							diffuse.wrapS = THREE.RepeatWrapping;
 							diffuse.wrapT = THREE.RepeatWrapping;
 							diffuse.repeat.x = 10;
 							diffuse.repeat.y = 10;
 
-							const normalMap = textureLoader.load( "textures/carbon/Carbon_Normal.png" );
+							const normalMap = textureLoader.load( 'textures/carbon/Carbon_Normal.png' );
 							normalMap.wrapS = THREE.RepeatWrapping;
 							normalMap.wrapT = THREE.RepeatWrapping;
 
-							const normalMap2 = textureLoader.load( "textures/water/Water_1_M_Normal.jpg" );
+							const normalMap2 = textureLoader.load( 'textures/water/Water_1_M_Normal.jpg' );
 
 							const normalMap3 = new THREE.CanvasTexture( new FlakesTexture() );
 							normalMap3.wrapS = THREE.RepeatWrapping;
@@ -79,9 +75,9 @@
 							normalMap3.repeat.y = 6;
 							normalMap3.anisotropy = 16;
 
-							const normalMap4 = textureLoader.load( "textures/golfball.jpg" );
+							const normalMap4 = textureLoader.load( 'textures/golfball.jpg' );
 
-							const clearcoatNormaMap = textureLoader.load( "textures/pbr/Scratched_gold/Scratched_gold_01_1K_Normal.png" );
+							const clearcoatNormaMap = textureLoader.load( 'textures/pbr/Scratched_gold/Scratched_gold_01_1K_Normal.png' );
 
 							// car paint
 
@@ -151,8 +147,8 @@
 
 							//
 
-							scene.background = hdrCubeRenderTarget.texture;
-							scene.environment = hdrCubeRenderTarget.texture;
+							scene.background = texture;
+							scene.environment = texture;
 
 						}
 
@@ -184,11 +180,6 @@
 
 				//
 
-				const pmremGenerator = new THREE.PMREMGenerator( renderer );
-				pmremGenerator.compileEquirectangularShader();
-
-				//
-
 				stats = new Stats();
 				container.appendChild( stats.dom );
 

examples/webgl_materials_physical_reflectivity.html

@@ -36,7 +36,6 @@
 			};
 			let camera, scene, renderer;
 			let gemBackMaterial, gemFrontMaterial;
-			let hdrCubeRenderTarget;
 
 			const objects = [];
 
@@ -114,23 +113,17 @@
 				} );
 
 				new RGBELoader()
-					.setDataType( THREE.UnsignedByteType )
+					.setDataType( THREE.FloatType )
 					.setPath( 'textures/equirectangular/' )
-					.load( 'royal_esplanade_1k.hdr', function ( hdrEquirect ) {
+					.load( 'royal_esplanade_1k.hdr', function ( texture ) {
 
-						hdrCubeRenderTarget = pmremGenerator.fromEquirectangular( hdrEquirect );
-						pmremGenerator.dispose();
+						texture.mapping = THREE.EquirectangularReflectionMapping;
 
-						gemFrontMaterial.envMap = gemBackMaterial.envMap = hdrCubeRenderTarget.texture;
+						gemFrontMaterial.envMap = gemBackMaterial.envMap = texture;
 						gemFrontMaterial.needsUpdate = gemBackMaterial.needsUpdate = true;
 
-						hdrEquirect.dispose();
-
 					} );
 
-				const pmremGenerator = new THREE.PMREMGenerator( renderer );
-				pmremGenerator.compileEquirectangularShader();
-
 				// Lights
 
 				scene.add( new THREE.AmbientLight( 0x222222 ) );

examples/webgl_materials_physical_transmission.html

@@ -34,14 +34,15 @@
 
 			let camera, scene, renderer;
 
-			let hdrCubeRenderTarget;
 			let mesh;
 
 			const hdrEquirect = new RGBELoader()
-				.setDataType( THREE.UnsignedByteType )
+				.setDataType( THREE.FloatType )
 				.setPath( 'textures/equirectangular/' )
 				.load( 'royal_esplanade_1k.hdr', function () {
 
+					hdrEquirect.mapping = THREE.EquirectangularReflectionMapping;
+
 					init();
 					render();
 
@@ -67,12 +68,7 @@
 
 				//
 
-				const pmremGenerator = new THREE.PMREMGenerator( renderer );
-				hdrCubeRenderTarget = pmremGenerator.fromEquirectangular( hdrEquirect );
-				hdrEquirect.dispose();
-				pmremGenerator.dispose();
-
-				scene.background = hdrCubeRenderTarget.texture;
+				scene.background = hdrEquirect;
 
 				//
 
@@ -90,7 +86,7 @@
 					roughness: params.roughness,
 					reflectivity: params.reflectivity,
 					alphaMap: texture,
-					envMap: hdrCubeRenderTarget.texture,
+					envMap: hdrEquirect,
 					envMapIntensity: params.envMapIntensity,
 					transmission: params.transmission, // use material.transmission for glass materials
 					opacity: params.opacity,

examples/webgl_materials_standard.html

@@ -109,7 +109,7 @@
 
 				};
 
-				function loadEnvironment(name) {
+				function loadEnvironment( name ) {
 
 					if ( environments[ name ].texture !== undefined ) {
 
@@ -121,18 +121,17 @@
 
 					const filename = environments[ name ].filename;
 					new RGBELoader()
-					.setDataType( THREE.UnsignedByteType )
-					.setPath( 'textures/equirectangular/' )
-					.load( filename, function ( hdrEquirect ) {
+						.setDataType( THREE.FloatType )
+						.setPath( 'textures/equirectangular/' )
+						.load( filename, function ( hdrEquirect ) {
 
-						const hdrCubeRenderTarget = pmremGenerator.fromEquirectangular( hdrEquirect );
-						hdrEquirect.dispose();
+							hdrEquirect.mapping = THREE.EquirectangularReflectionMapping;
 
-						scene.background = hdrCubeRenderTarget.texture;
-						scene.environment = hdrCubeRenderTarget.texture;
-						environments[ name ].texture = hdrCubeRenderTarget.texture;
+							scene.background = hdrEquirect;
+							scene.environment = hdrEquirect;
+							environments[ name ].texture = hdrEquirect;
 
-					} );
+						} );
 
 				}
 
@@ -144,16 +143,13 @@
 				loadEnvironment( params.environment );
 
 				const gui = new GUI();
-				gui.add( params, 'environment', Object.keys( environments ) ).onChange( function( value ) {
+				gui.add( params, 'environment', Object.keys( environments ) ).onChange( function ( value ) {
 
-					loadEnvironment(value);
+					loadEnvironment( value );
 
 				} );
 				gui.open();
 
-				const pmremGenerator = new THREE.PMREMGenerator( renderer );
-				pmremGenerator.compileEquirectangularShader();
-
 				//
 
 				if ( statsEnabled ) {

examples/webgl_materials_variations_physical.html

@@ -46,16 +46,12 @@
 
 				scene = new THREE.Scene();
 
-				let hdrCubeRenderTarget = null;
-
 				new RGBELoader()
-					.setDataType( THREE.UnsignedByteType )
+					.setDataType( THREE.FloatType )
 					.setPath( 'textures/equirectangular/' )
-					.load( 'pedestrian_overpass_1k.hdr', function ( hdrEquirect ) {
+					.load( 'pedestrian_overpass_1k.hdr', function ( texture ) {
 
-						hdrCubeRenderTarget = pmremGenerator.fromEquirectangular( hdrEquirect );
-						hdrEquirect.dispose();
-						pmremGenerator.dispose();
+						texture.mapping = THREE.EquirectangularReflectionMapping;
 
 						// Materials
 
@@ -83,7 +79,7 @@
 										clearcoat: 1.0 - alpha,
 										clearcoatRoughness: 1.0 - beta,
 										reflectivity: 1.0 - gamma,
-										envMap: ( index % 2 ) == 1 ? hdrCubeRenderTarget.texture : null
+										envMap: ( index % 2 ) == 1 ? texture : null
 									} );
 
 									index ++;
@@ -106,7 +102,7 @@
 
 						}
 
-						scene.background = hdrCubeRenderTarget.texture;
+						scene.background = texture;
 
 					} );
 
@@ -129,14 +125,14 @@
 
 				}
 
-				addLabel( "+clearcoat", new THREE.Vector3( - 350, 0, 0 ) );
-				addLabel( "-clearcoat", new THREE.Vector3( 350, 0, 0 ) );
+				addLabel( '+clearcoat', new THREE.Vector3( - 350, 0, 0 ) );
+				addLabel( '-clearcoat', new THREE.Vector3( 350, 0, 0 ) );
 
-				addLabel( "+clearcoatRoughness", new THREE.Vector3( 0, - 300, 0 ) );
-				addLabel( "-clearcoatRoughness", new THREE.Vector3( 0, 300, 0 ) );
+				addLabel( '+clearcoatRoughness', new THREE.Vector3( 0, - 300, 0 ) );
+				addLabel( '-clearcoatRoughness', new THREE.Vector3( 0, 300, 0 ) );
 
-				addLabel( "+reflectivity", new THREE.Vector3( 0, 0, - 300 ) );
-				addLabel( "-reflectivity", new THREE.Vector3( 0, 0, 300 ) );
+				addLabel( '+reflectivity', new THREE.Vector3( 0, 0, - 300 ) );
+				addLabel( '-reflectivity', new THREE.Vector3( 0, 0, 300 ) );
 
 				particleLight = new THREE.Mesh( new THREE.SphereGeometry( 4, 8, 8 ), new THREE.MeshBasicMaterial( { color: 0xffffff } ) );
 				scene.add( particleLight );
@@ -165,11 +161,6 @@
 
 				//
 
-				const pmremGenerator = new THREE.PMREMGenerator( renderer );
-				pmremGenerator.compileEquirectangularShader();
-
-				//
-
 				stats = new Stats();
 				container.appendChild( stats.dom );
 

examples/webgl_materials_variations_standard.html

@@ -44,23 +44,19 @@
 
 				scene = new THREE.Scene();
 
-				let hdrCubeRenderTarget = null;
-
 				// Materials
 
-				let imgTexture = new THREE.TextureLoader().load( "textures/planets/moon_1024.jpg" );
+				let imgTexture = new THREE.TextureLoader().load( 'textures/planets/moon_1024.jpg' );
 				imgTexture.wrapS = imgTexture.wrapT = THREE.RepeatWrapping;
 				imgTexture.anisotropy = 16;
 				imgTexture = null;
 
 				new RGBELoader()
-					.setDataType( THREE.UnsignedByteType )
+					.setDataType( THREE.FloatType )
 					.setPath( 'textures/equirectangular/' )
-					.load( 'pedestrian_overpass_1k.hdr', function ( hdrEquirect ) {
+					.load( 'pedestrian_overpass_1k.hdr', function ( texture ) {
 
-						hdrCubeRenderTarget = pmremGenerator.fromEquirectangular( hdrEquirect );
-						hdrEquirect.dispose();
-						pmremGenerator.dispose();
+						texture.mapping = THREE.EquirectangularReflectionMapping;
 
 						const bumpScale = 1;
 						const cubeWidth = 400;
@@ -88,7 +84,7 @@
 										color: diffuseColor,
 										metalness: beta,
 										roughness: 1.0 - alpha,
-										envMap: index % 2 === 0 ? null : hdrCubeRenderTarget.texture
+										envMap: index % 2 === 0 ? null : texture
 									} );
 
 									index ++;
@@ -109,7 +105,7 @@
 
 						}
 
-						scene.background = hdrCubeRenderTarget.texture;
+						scene.background = texture;
 
 					} );
 
@@ -132,14 +128,14 @@
 
 				}
 
-				addLabel( "+roughness", new THREE.Vector3( - 350, 0, 0 ) );
-				addLabel( "-roughness", new THREE.Vector3( 350, 0, 0 ) );
+				addLabel( '+roughness', new THREE.Vector3( - 350, 0, 0 ) );
+				addLabel( '-roughness', new THREE.Vector3( 350, 0, 0 ) );
 
-				addLabel( "-metalness", new THREE.Vector3( 0, - 300, 0 ) );
-				addLabel( "+metalness", new THREE.Vector3( 0, 300, 0 ) );
+				addLabel( '-metalness', new THREE.Vector3( 0, - 300, 0 ) );
+				addLabel( '+metalness', new THREE.Vector3( 0, 300, 0 ) );
 
-				addLabel( "-diffuse", new THREE.Vector3( 0, 0, - 300 ) );
-				addLabel( "+diffuse", new THREE.Vector3( 0, 0, 300 ) );
+				addLabel( '-diffuse', new THREE.Vector3( 0, 0, - 300 ) );
+				addLabel( '+diffuse', new THREE.Vector3( 0, 0, 300 ) );
 
 				particleLight = new THREE.Mesh( new THREE.SphereGeometry( 4, 8, 8 ), new THREE.MeshBasicMaterial( { color: 0xffffff } ) );
 				scene.add( particleLight );
@@ -168,11 +164,6 @@
 
 				//
 
-				const pmremGenerator = new THREE.PMREMGenerator( renderer );
-				pmremGenerator.compileEquirectangularShader();
-
-				//
-
 				stats = new Stats();
 				container.appendChild( stats.dom );
 

examples/webgl_postprocessing_3dlut.html

@@ -63,17 +63,14 @@
 				scene = new THREE.Scene();
 
 				new RGBELoader()
-					.setDataType( THREE.UnsignedByteType )
+					.setDataType( THREE.FloatType )
 					.setPath( 'textures/equirectangular/' )
 					.load( 'royal_esplanade_1k.hdr', function ( texture ) {
 
-						const envMap = pmremGenerator.fromEquirectangular( texture ).texture;
+						texture.mapping = THREE.EquirectangularReflectionMapping;
 
-						scene.background = envMap;
-						scene.environment = envMap;
-
-						texture.dispose();
-						pmremGenerator.dispose();
+						scene.background = texture;
+						scene.environment = texture;
 
 						// model
 
@@ -120,9 +117,6 @@
 				lutPass = new LUTPass();
 				composer.addPass( lutPass );
 
-				const pmremGenerator = new THREE.PMREMGenerator( renderer );
-				pmremGenerator.compileEquirectangularShader();
-
 				const controls = new OrbitControls( camera, renderer.domElement );
 				controls.minDistance = 2;
 				controls.maxDistance = 10;

examples/webgl_tonemapping.html

@@ -84,11 +84,8 @@
 				controls.target.set( 0, 0, - 0.2 );
 				controls.update();
 
-				const pmremGenerator = new THREE.PMREMGenerator( renderer );
-				pmremGenerator.compileEquirectangularShader();
-
 				const rgbeLoader = new RGBELoader()
-					.setDataType( THREE.UnsignedByteType )
+					.setDataType( THREE.FloatType )
 					.setPath( 'textures/equirectangular/' );
 
 				const gltfLoader = new GLTFLoader().setPath( 'models/gltf/DamagedHelmet/glTF/' );
@@ -100,13 +97,10 @@
 
 				// environment
 
-				const envMap = pmremGenerator.fromEquirectangular( texture ).texture;
-
-				scene.background = envMap;
-				scene.environment = envMap;
+				texture.mapping = THREE.EquirectangularReflectionMapping;
 
-				texture.dispose();
-				pmremGenerator.dispose();
+				scene.background = texture;
+				scene.environment = texture;
 
 				// model
 

examples/webxr_ar_lighting.html

@@ -83,20 +83,16 @@
 
 				//
 
-				const pmremGenerator = new THREE.PMREMGenerator( renderer );
-				pmremGenerator.compileEquirectangularShader();
-
 				new RGBELoader()
 					.setDataType( THREE.UnsignedByteType )
 					.setPath( 'textures/equirectangular/' )
 					.load( 'royal_esplanade_1k.hdr', function ( texture ) {
 
-						defaultEnvironment = pmremGenerator.fromEquirectangular( texture ).texture;
+						texture.mapping = THREE.EquirectangularReflectionMapping;
 
-						scene.environment = defaultEnvironment;
+						defaultEnvironment = texture;
 
-						texture.dispose();
-						pmremGenerator.dispose();
+						scene.environment = defaultEnvironment;
 
 					} );
 

src/renderers/WebGLCubeRenderTarget.js

@@ -23,7 +23,16 @@ class WebGLCubeRenderTarget extends WebGLRenderTarget {
 
 		options = options || {};
 
+		// By convention -- likely based on the RenderMan spec from the 1990's -- cube maps are specified by WebGL (and three.js)
+		// in a coordinate system in which positive-x is to the right when looking up the positive-z axis -- in other words,
+		// in a left-handed coordinate system. By continuing this convention, preexisting cube maps continued to render correctly.
+
+		// three.js uses a right-handed coordinate system. So environment maps used in three.js appear to have px and nx swapped
+		// and the flag isRenderTargetTexture controls this conversion. The flip is not required when using WebGLCubeRenderTarget.texture
+		// as a cube texture (this is detected when isRenderTargetTexture is set to true for cube textures).
+
 		this.texture = new CubeTexture( undefined, options.mapping, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.encoding );
+		this.texture.isRenderTargetTexture = true;
 
 		this.texture.generateMipmaps = options.generateMipmaps !== undefined ? options.generateMipmaps : false;
 		this.texture.minFilter = options.minFilter !== undefined ? options.minFilter : LinearFilter;

src/renderers/WebGLRenderTarget.js

@@ -24,6 +24,7 @@ class WebGLRenderTarget extends EventDispatcher {
 		this.viewport = new Vector4( 0, 0, width, height );
 
 		this.texture = new Texture( undefined, options.mapping, options.wrapS, options.wrapT, options.magFilter, options.minFilter, options.format, options.type, options.anisotropy, options.encoding );
+		this.texture.isRenderTargetTexture = true;
 
 		this.texture.image = { width: width, height: height, depth: 1 };
 

src/renderers/WebGLRenderer.js

@@ -24,6 +24,7 @@ import { WebGLBufferRenderer } from './webgl/WebGLBufferRenderer.js';
 import { WebGLCapabilities } from './webgl/WebGLCapabilities.js';
 import { WebGLClipping } from './webgl/WebGLClipping.js';
 import { WebGLCubeMaps } from './webgl/WebGLCubeMaps.js';
+import { WebGLCubeUVMaps } from './webgl/WebGLCubeUVMaps.js';
 import { WebGLExtensions } from './webgl/WebGLExtensions.js';
 import { WebGLGeometries } from './webgl/WebGLGeometries.js';
 import { WebGLIndexedBufferRenderer } from './webgl/WebGLIndexedBufferRenderer.js';
@@ -266,7 +267,7 @@ function WebGLRenderer( parameters = {} ) {
 	}
 
 	let extensions, capabilities, state, info;
-	let properties, textures, cubemaps, attributes, geometries, objects;
+	let properties, textures, cubemaps, cubeuvmaps, attributes, geometries, objects;
 	let programCache, materials, renderLists, renderStates, clipping, shadowMap;
 
 	let background, morphtargets, bufferRenderer, indexedBufferRenderer;
@@ -291,13 +292,14 @@ function WebGLRenderer( parameters = {} ) {
 		properties = new WebGLProperties();
 		textures = new WebGLTextures( _gl, extensions, state, properties, capabilities, utils, info );
 		cubemaps = new WebGLCubeMaps( _this );
+		cubeuvmaps = new WebGLCubeUVMaps( _this );
 		attributes = new WebGLAttributes( _gl, capabilities );
 		bindingStates = new WebGLBindingStates( _gl, extensions, attributes, capabilities );
 		geometries = new WebGLGeometries( _gl, attributes, info, bindingStates );
 		objects = new WebGLObjects( _gl, geometries, attributes, info );
 		morphtargets = new WebGLMorphtargets( _gl );
 		clipping = new WebGLClipping( properties );
-		programCache = new WebGLPrograms( _this, cubemaps, extensions, capabilities, bindingStates, clipping );
+		programCache = new WebGLPrograms( _this, cubemaps, cubeuvmaps, extensions, capabilities, bindingStates, clipping );
 		materials = new WebGLMaterials( properties );
 		renderLists = new WebGLRenderLists( properties );
 		renderStates = new WebGLRenderStates( extensions, capabilities );
@@ -564,6 +566,7 @@ function WebGLRenderer( parameters = {} ) {
 		renderStates.dispose();
 		properties.dispose();
 		cubemaps.dispose();
+		cubeuvmaps.dispose();
 		objects.dispose();
 		bindingStates.dispose();
 
@@ -1388,7 +1391,7 @@ function WebGLRenderer( parameters = {} ) {
 
 		materialProperties.environment = material.isMeshStandardMaterial ? scene.environment : null;
 		materialProperties.fog = scene.fog;
-		materialProperties.envMap = cubemaps.get( material.envMap || materialProperties.environment );
+		materialProperties.envMap = ( material.isMeshStandardMaterial ? cubeuvmaps : cubemaps ).get( material.envMap || materialProperties.environment );
 
 		if ( programs === undefined ) {
 
@@ -1506,7 +1509,7 @@ function WebGLRenderer( parameters = {} ) {
 		const fog = scene.fog;
 		const environment = material.isMeshStandardMaterial ? scene.environment : null;
 		const encoding = ( _currentRenderTarget === null ) ? _this.outputEncoding : _currentRenderTarget.texture.encoding;
-		const envMap = cubemaps.get( material.envMap || environment );
+		const envMap = ( material.isMeshStandardMaterial ? cubeuvmaps : cubemaps ).get( material.envMap || environment );
 		const vertexAlphas = material.vertexColors === true && object.geometry && object.geometry.attributes.color && object.geometry.attributes.color.itemSize === 4;
 		const morphTargets = object.geometry && object.geometry.morphAttributes.position;
 		const morphNormals = object.geometry && object.geometry.morphAttributes.normal;

src/renderers/webgl/WebGLBackground.js

@@ -102,7 +102,7 @@ function WebGLBackground( renderer, cubemaps, state, objects, premultipliedAlpha
 			}
 
 			boxMesh.material.uniforms.envMap.value = background;
-			boxMesh.material.uniforms.flipEnvMap.value = ( background.isCubeTexture && background._needsFlipEnvMap ) ? - 1 : 1;
+			boxMesh.material.uniforms.flipEnvMap.value = ( background.isCubeTexture && background.isRenderTargetTexture === false ) ? - 1 : 1;
 
 			if ( currentBackground !== background ||
 				currentBackgroundVersion !== background.version ||

src/renderers/webgl/WebGLCubeMaps.js

@@ -23,7 +23,7 @@ function WebGLCubeMaps( renderer ) {
 
 	function get( texture ) {
 
-		if ( texture && texture.isTexture ) {
+		if ( texture && texture.isTexture && texture.isRenderTargetTexture === false ) {
 
 			const mapping = texture.mapping;
 

src/renderers/webgl/WebGLCubeUVMaps.js

@@ -0,0 +1,117 @@
+import { CubeReflectionMapping, CubeRefractionMapping, EquirectangularReflectionMapping, EquirectangularRefractionMapping } from '../../constants.js';
+import { PMREMGenerator } from '../../extras/PMREMGenerator.js';
+
+function WebGLCubeUVMaps( renderer ) {
+
+	let cubeUVmaps = new WeakMap();
+
+	let pmremGenerator = null;
+
+	function get( texture ) {
+
+		if ( texture && texture.isTexture && texture.isRenderTargetTexture === false ) {
+
+			const mapping = texture.mapping;
+
+			const isEquirectMap = ( mapping === EquirectangularReflectionMapping || mapping === EquirectangularRefractionMapping );
+			const isCubeMap = ( mapping === CubeReflectionMapping || mapping === CubeRefractionMapping );
+
+			if ( isEquirectMap || isCubeMap ) {
+
+				// equirect/cube map to cubeUV conversion
+
+				if ( cubeUVmaps.has( texture ) ) {
+
+					return cubeUVmaps.get( texture ).texture;
+
+				} else {
+
+					const image = texture.image;
+
+					if ( ( isEquirectMap && image && image.height > 0 ) || ( isCubeMap && image && isCubeTextureComplete( image ) ) ) {
+
+						const currentRenderTarget = renderer.getRenderTarget();
+
+						if ( pmremGenerator === null ) pmremGenerator = new PMREMGenerator( renderer );
+
+						const renderTarget = isEquirectMap ? pmremGenerator.fromEquirectangular( texture ) : pmremGenerator.fromCubemap( texture );
+						cubeUVmaps.set( texture, renderTarget );
+
+						renderer.setRenderTarget( currentRenderTarget );
+
+						texture.addEventListener( 'dispose', onTextureDispose );
+
+						return renderTarget.texture;
+
+					} else {
+
+						// image not yet ready. try the conversion next frame
+
+						return null;
+
+					}
+
+				}
+
+			}
+
+		}
+
+		return texture;
+
+	}
+
+	function isCubeTextureComplete( image ) {
+
+		let count = 0;
+		const length = 6;
+
+		for ( let i = 0; i < length; i ++ ) {
+
+			if ( image[ i ] !== undefined ) count ++;
+
+		}
+
+		return count === length;
+
+
+	}
+
+	function onTextureDispose( event ) {
+
+		const texture = event.target;
+
+		texture.removeEventListener( 'dispose', onTextureDispose );
+
+		const cubemapUV = cubeUVmaps.get( texture );
+
+		if ( cubemapUV !== undefined ) {
+
+			cubemapUV.delete( texture );
+			cubemapUV.dispose();
+
+		}
+
+	}
+
+	function dispose() {
+
+		cubeUVmaps = new WeakMap();
+
+		if ( pmremGenerator !== null ) {
+
+			pmremGenerator.dispose();
+			pmremGenerator = null;
+
+		}
+
+	}
+
+	return {
+		get: get,
+		dispose: dispose
+	};
+
+}
+
+export { WebGLCubeUVMaps };

src/renderers/webgl/WebGLMaterials.js

@@ -145,7 +145,7 @@ function WebGLMaterials( properties ) {
 
 			uniforms.envMap.value = envMap;
 
-			uniforms.flipEnvMap.value = ( envMap.isCubeTexture && envMap._needsFlipEnvMap ) ? - 1 : 1;
+			uniforms.flipEnvMap.value = ( envMap.isCubeTexture && envMap.isRenderTargetTexture === false ) ? - 1 : 1;
 
 			uniforms.reflectivity.value = material.reflectivity;
 			uniforms.refractionRatio.value = material.refractionRatio;

src/renderers/webgl/WebGLPrograms.js

@@ -3,7 +3,7 @@ import { WebGLProgram } from './WebGLProgram.js';
 import { ShaderLib } from '../shaders/ShaderLib.js';
 import { UniformsUtils } from '../shaders/UniformsUtils.js';
 
-function WebGLPrograms( renderer, cubemaps, extensions, capabilities, bindingStates, clipping ) {
+function WebGLPrograms( renderer, cubemaps, cubeuvmaps, extensions, capabilities, bindingStates, clipping ) {
 
 	const programs = [];
 
@@ -112,7 +112,7 @@ function WebGLPrograms( renderer, cubemaps, extensions, capabilities, bindingSta
 		const fog = scene.fog;
 		const environment = material.isMeshStandardMaterial ? scene.environment : null;
 
-		const envMap = cubemaps.get( material.envMap || environment );
+		const envMap = ( material.isMeshStandardMaterial ? cubeuvmaps : cubemaps ).get( material.envMap || environment );
 
 		const shaderID = shaderIDs[ material.type ];
 

src/textures/CubeTexture.js

@@ -11,18 +11,6 @@ class CubeTexture extends Texture {
 
 		super( images, mapping, wrapS, wrapT, magFilter, minFilter, format, type, anisotropy, encoding );
 
-		// Why CubeTexture._needsFlipEnvMap is necessary:
-		//
-		// By convention -- likely based on the RenderMan spec from the 1990's -- cube maps are specified by WebGL (and three.js)
-		// in a coordinate system in which positive-x is to the right when looking up the positive-z axis -- in other words,
-		// in a left-handed coordinate system. By continuing this convention, preexisting cube maps continued to render correctly.
-
-		// three.js uses a right-handed coordinate system. So environment maps used in three.js appear to have px and nx swapped
-		// and the flag _needsFlipEnvMap controls this conversion. The flip is not required (and thus _needsFlipEnvMap is set to false)
-		// when using WebGLCubeRenderTarget.texture as a cube texture.
-
-		this._needsFlipEnvMap = true;
-
 		this.flipY = false;
 
 	}

src/textures/Texture.js

@@ -68,6 +68,8 @@ class Texture extends EventDispatcher {
 		this.version = 0;
 		this.onUpdate = null;
 
+		this.isRenderTargetTexture = false;
+
 	}
 
 	updateMatrix() {