SceneNode: Add backgroundIntensity (#26447)

* SceneNode: Add backgroundIntensity

* Add backgroundIntensity

examples/jsm/nodes/Nodes.js

@@ -82,7 +82,7 @@ export { default as PositionNode, positionGeometry, positionLocal, positionWorld
 export { default as ReferenceNode, reference } from './accessors/ReferenceNode.js';
 export { default as ReflectVectorNode, reflectVector } from './accessors/ReflectVectorNode.js';
 export { default as SkinningNode, skinning } from './accessors/SkinningNode.js';
-export { default as SceneNode, backgroundBlurriness } from './accessors/SceneNode.js';
+export { default as SceneNode, backgroundBlurriness, backgroundIntensity } from './accessors/SceneNode.js';
 export { default as StorageBufferNode, storage } from './accessors/StorageBufferNode.js';
 export { default as TangentNode, tangentGeometry, tangentLocal, tangentView, tangentWorld, transformedTangentView, transformedTangentWorld } from './accessors/TangentNode.js';
 export { default as TextureNode, texture, /*textureLevel,*/ sampler } from './accessors/TextureNode.js';

examples/jsm/nodes/accessors/SceneNode.js

@@ -25,6 +25,10 @@ class SceneNode extends Node {
 
 			output = reference( 'backgroundBlurriness', 'float', scene );
 
+		} else if ( scope === SceneNode.BACKGROUND_INTENSITY ) {
+
+			output = reference( 'backgroundIntensity', 'float', scene );
+
 		} else {
 
 			console.error( 'THREE.SceneNode: Unknown scope:', scope );
@@ -38,9 +42,11 @@ class SceneNode extends Node {
 }
 
 SceneNode.BACKGROUND_BLURRINESS = 'backgroundBlurriness';
+SceneNode.BACKGROUND_INTENSITY = 'backgroundIntensity';
 
 export default SceneNode;
 
 export const backgroundBlurriness = nodeImmutable( SceneNode, SceneNode.BACKGROUND_BLURRINESS );
+export const backgroundIntensity = nodeImmutable( SceneNode, SceneNode.BACKGROUND_INTENSITY );
 
 addNodeClass( SceneNode );

examples/jsm/renderers/common/Background.js

@@ -1,6 +1,6 @@
 import DataMap from './DataMap.js';
 import { Color, Mesh, SphereGeometry, BackSide } from 'three';
-import { context, positionWorldDirection, backgroundBlurriness, MeshBasicNodeMaterial } from '../../nodes/Nodes.js';
+import { context, positionWorldDirection, backgroundBlurriness, backgroundIntensity, MeshBasicNodeMaterial } from '../../nodes/Nodes.js';
 
 let _clearAlpha;
 const _clearColor = new Color();
@@ -57,7 +57,7 @@ class Background extends DataMap {
 					// @TODO: Add Texture2D support using node context
 					getUVNode: () => positionWorldDirection,
 					getSamplerLevelNode: () => backgroundBlurriness
-				} );
+				} ).mul( backgroundIntensity );
 
 				const nodeMaterial = new MeshBasicNodeMaterial();
 				nodeMaterial.colorNode = this.boxMeshNode;