Updated builds.

build/three.cjs

@@ -2001,7 +2001,7 @@ class Texture extends EventDispatcher {
 		this.onUpdate = null;
 
 		this.isRenderTargetTexture = false; // indicates whether a texture belongs to a render target or not
-		this.needsPMREMUpdate = false; // indicates whether this texture should be processed by PMREMGenerator or not (only relevant for render target textures)
+		this.pmremVersion = 0; // indicates whether this texture should be processed by PMREMGenerator or not (only relevant for render target textures)
 
 	}
 
@@ -2232,6 +2232,16 @@ class Texture extends EventDispatcher {
 
 	}
 
+	set needsPMREMUpdate( value ) {
+
+		if ( value === true ) {
+
+			this.pmremVersion ++;
+
+		}
+
+	}
+
 }
 
 Texture.DEFAULT_IMAGE = null;
@@ -17041,24 +17051,26 @@ function WebGLCubeUVMaps( renderer ) {
 
 			if ( isEquirectMap || isCubeMap ) {
 
-				if ( texture.isRenderTargetTexture && texture.needsPMREMUpdate === true ) {
+				let renderTarget = cubeUVmaps.get( texture );
 
-					texture.needsPMREMUpdate = false;
+				const currentPMREMVersion = renderTarget !== undefined ? renderTarget.texture.pmremVersion : 0;
 
-					let renderTarget = cubeUVmaps.get( texture );
+				if ( texture.isRenderTargetTexture && texture.pmremVersion !== currentPMREMVersion ) {
 
 					if ( pmremGenerator === null ) pmremGenerator = new PMREMGenerator( renderer );
 
 					renderTarget = isEquirectMap ? pmremGenerator.fromEquirectangular( texture, renderTarget ) : pmremGenerator.fromCubemap( texture, renderTarget );
+					renderTarget.texture.pmremVersion = texture.pmremVersion;
+
 					cubeUVmaps.set( texture, renderTarget );
 
 					return renderTarget.texture;
 
 				} else {
 
-					if ( cubeUVmaps.has( texture ) ) {
+					if ( renderTarget !== undefined ) {
 
-						return cubeUVmaps.get( texture ).texture;
+						return renderTarget.texture;
 
 					} else {
 
@@ -17068,7 +17080,9 @@ function WebGLCubeUVMaps( renderer ) {
 
 							if ( pmremGenerator === null ) pmremGenerator = new PMREMGenerator( renderer );
 
-							const renderTarget = isEquirectMap ? pmremGenerator.fromEquirectangular( texture ) : pmremGenerator.fromCubemap( texture );
+							renderTarget = isEquirectMap ? pmremGenerator.fromEquirectangular( texture ) : pmremGenerator.fromCubemap( texture );
+							renderTarget.texture.pmremVersion = texture.pmremVersion;
+
 							cubeUVmaps.set( texture, renderTarget );
 
 							texture.addEventListener( 'dispose', onTextureDispose );
@@ -32356,6 +32370,7 @@ class InstancedMesh extends Mesh {
 
 		this.instanceMatrix.copy( source.instanceMatrix );
 
+		if ( source.morphTexture !== null ) this.morphTexture = source.morphTexture.clone();
 		if ( source.instanceColor !== null ) this.instanceColor = source.instanceColor.clone();
 
 		this.count = source.count;
@@ -32507,6 +32522,15 @@ class InstancedMesh extends Mesh {
 
 		this.dispatchEvent( { type: 'dispose' } );
 
+		if ( this.morphTexture !== null ) {
+
+			this.morphTexture.dispose();
+			this.morphTexture = null;
+
+		}
+
+		return this;
+
 	}
 
 }
@@ -42384,7 +42408,7 @@ VectorKeyframeTrack.prototype.ValueTypeName = 'vector';
 
 class AnimationClip {
 
-	constructor( name, duration = - 1, tracks, blendMode = NormalAnimationBlendMode ) {
+	constructor( name = '', duration = - 1, tracks = [], blendMode = NormalAnimationBlendMode ) {
 
 		this.name = name;
 		this.tracks = tracks;

build/three.module.js

@@ -1999,7 +1999,7 @@ class Texture extends EventDispatcher {
 		this.onUpdate = null;
 
 		this.isRenderTargetTexture = false; // indicates whether a texture belongs to a render target or not
-		this.needsPMREMUpdate = false; // indicates whether this texture should be processed by PMREMGenerator or not (only relevant for render target textures)
+		this.pmremVersion = 0; // indicates whether this texture should be processed by PMREMGenerator or not (only relevant for render target textures)
 
 	}
 
@@ -2230,6 +2230,16 @@ class Texture extends EventDispatcher {
 
 	}
 
+	set needsPMREMUpdate( value ) {
+
+		if ( value === true ) {
+
+			this.pmremVersion ++;
+
+		}
+
+	}
+
 }
 
 Texture.DEFAULT_IMAGE = null;
@@ -17039,24 +17049,26 @@ function WebGLCubeUVMaps( renderer ) {
 
 			if ( isEquirectMap || isCubeMap ) {
 
-				if ( texture.isRenderTargetTexture && texture.needsPMREMUpdate === true ) {
+				let renderTarget = cubeUVmaps.get( texture );
 
-					texture.needsPMREMUpdate = false;
+				const currentPMREMVersion = renderTarget !== undefined ? renderTarget.texture.pmremVersion : 0;
 
-					let renderTarget = cubeUVmaps.get( texture );
+				if ( texture.isRenderTargetTexture && texture.pmremVersion !== currentPMREMVersion ) {
 
 					if ( pmremGenerator === null ) pmremGenerator = new PMREMGenerator( renderer );
 
 					renderTarget = isEquirectMap ? pmremGenerator.fromEquirectangular( texture, renderTarget ) : pmremGenerator.fromCubemap( texture, renderTarget );
+					renderTarget.texture.pmremVersion = texture.pmremVersion;
+
 					cubeUVmaps.set( texture, renderTarget );
 
 					return renderTarget.texture;
 
 				} else {
 
-					if ( cubeUVmaps.has( texture ) ) {
+					if ( renderTarget !== undefined ) {
 
-						return cubeUVmaps.get( texture ).texture;
+						return renderTarget.texture;
 
 					} else {
 
@@ -17066,7 +17078,9 @@ function WebGLCubeUVMaps( renderer ) {
 
 							if ( pmremGenerator === null ) pmremGenerator = new PMREMGenerator( renderer );
 
-							const renderTarget = isEquirectMap ? pmremGenerator.fromEquirectangular( texture ) : pmremGenerator.fromCubemap( texture );
+							renderTarget = isEquirectMap ? pmremGenerator.fromEquirectangular( texture ) : pmremGenerator.fromCubemap( texture );
+							renderTarget.texture.pmremVersion = texture.pmremVersion;
+
 							cubeUVmaps.set( texture, renderTarget );
 
 							texture.addEventListener( 'dispose', onTextureDispose );
@@ -32354,6 +32368,7 @@ class InstancedMesh extends Mesh {
 
 		this.instanceMatrix.copy( source.instanceMatrix );
 
+		if ( source.morphTexture !== null ) this.morphTexture = source.morphTexture.clone();
 		if ( source.instanceColor !== null ) this.instanceColor = source.instanceColor.clone();
 
 		this.count = source.count;
@@ -32505,6 +32520,15 @@ class InstancedMesh extends Mesh {
 
 		this.dispatchEvent( { type: 'dispose' } );
 
+		if ( this.morphTexture !== null ) {
+
+			this.morphTexture.dispose();
+			this.morphTexture = null;
+
+		}
+
+		return this;
+
 	}
 
 }
@@ -42382,7 +42406,7 @@ VectorKeyframeTrack.prototype.ValueTypeName = 'vector';
 
 class AnimationClip {
 
-	constructor( name, duration = - 1, tracks, blendMode = NormalAnimationBlendMode ) {
+	constructor( name = '', duration = - 1, tracks = [], blendMode = NormalAnimationBlendMode ) {
 
 		this.name = name;
 		this.tracks = tracks;