NodeMaterial: Honor `lightMapIntensity`. (#28814)

src/nodes/Nodes.js

@@ -86,7 +86,7 @@ export { default as VertexColorNode, vertexColor } from './accessors/VertexColor
 export { default as CubeTextureNode, cubeTexture } from './accessors/CubeTextureNode.js';
 export { default as InstanceNode, instance } from './accessors/InstanceNode.js';
 export { default as BatchNode, batch } from './accessors/BatchNode.js';
-export { default as MaterialNode, materialAlphaTest, materialColor, materialShininess, materialEmissive, materialOpacity, materialSpecular, materialSpecularStrength, materialReflectivity, materialRoughness, materialMetalness, materialNormal, materialClearcoat, materialClearcoatRoughness, materialClearcoatNormal, materialRotation, materialSheen, materialSheenRoughness, materialIridescence, materialIridescenceIOR, materialIridescenceThickness, materialLineScale, materialLineDashSize, materialLineGapSize, materialLineWidth, materialLineDashOffset, materialPointWidth, materialAnisotropy, materialAnisotropyVector, materialDispersion } from './accessors/MaterialNode.js';
+export { default as MaterialNode, materialAlphaTest, materialColor, materialShininess, materialEmissive, materialOpacity, materialSpecular, materialSpecularStrength, materialReflectivity, materialRoughness, materialMetalness, materialNormal, materialClearcoat, materialClearcoatRoughness, materialClearcoatNormal, materialRotation, materialSheen, materialSheenRoughness, materialIridescence, materialIridescenceIOR, materialIridescenceThickness, materialLineScale, materialLineDashSize, materialLineGapSize, materialLineWidth, materialLineDashOffset, materialPointWidth, materialAnisotropy, materialAnisotropyVector, materialDispersion, materialLightMap } from './accessors/MaterialNode.js';
 export { default as MaterialReferenceNode, materialReference } from './accessors/MaterialReferenceNode.js';
 export { default as RendererReferenceNode, rendererReference } from './accessors/RendererReferenceNode.js';
 export { default as MorphNode, morphReference } from './accessors/MorphNode.js';

src/nodes/accessors/MaterialNode.js

@@ -319,6 +319,10 @@ class MaterialNode extends Node {
 
 			node = this.getFloat( scope );
 
+		} else if ( scope === MaterialNode.LIGHT_MAP ) {
+
+			node = this.getTexture( scope ).rgb.mul( this.getFloat( 'lightMapIntensity' ) );
+
 		} else {
 
 			const outputType = this.getNodeType( builder );
@@ -368,6 +372,7 @@ MaterialNode.LINE_WIDTH = 'linewidth';
 MaterialNode.LINE_DASH_OFFSET = 'dashOffset';
 MaterialNode.POINT_WIDTH = 'pointWidth';
 MaterialNode.DISPERSION = 'dispersion';
+MaterialNode.LIGHT_MAP = 'light';
 
 export default MaterialNode;
 
@@ -408,6 +413,7 @@ export const materialLineWidth = nodeImmutable( MaterialNode, MaterialNode.LINE_
 export const materialLineDashOffset = nodeImmutable( MaterialNode, MaterialNode.LINE_DASH_OFFSET );
 export const materialPointWidth = nodeImmutable( MaterialNode, MaterialNode.POINT_WIDTH );
 export const materialDispersion = nodeImmutable( MaterialNode, MaterialNode.DISPERSION );
+export const materialLightMap = nodeImmutable( MaterialNode, MaterialNode.LIGHT_MAP );
 export const materialAnisotropyVector = uniform( new Vector2() ).onReference( function ( frame ) {
 
 	return frame.material;

src/nodes/materials/NodeMaterial.js

@@ -4,7 +4,7 @@ import { NormalBlending } from '../../constants.js';
 import { getNodeChildren, getCacheKey } from '../core/NodeUtils.js';
 import { attribute } from '../core/AttributeNode.js';
 import { output, diffuseColor, varyingProperty } from '../core/PropertyNode.js';
-import { materialAlphaTest, materialColor, materialOpacity, materialEmissive, materialNormal } from '../accessors/MaterialNode.js';
+import { materialAlphaTest, materialColor, materialOpacity, materialEmissive, materialNormal, materialLightMap } from '../accessors/MaterialNode.js';
 import { modelViewProjection } from '../accessors/ModelViewProjectionNode.js';
 import { transformedNormalView, normalLocal } from '../accessors/NormalNode.js';
 import { instance } from '../accessors/InstanceNode.js';
@@ -367,7 +367,7 @@ class NodeMaterial extends Material {
 
 		if ( builder.material.lightMap ) {
 
-			materialLightsNode.push( new IrradianceNode( materialReference( 'lightMap', 'texture' ) ) );
+			materialLightsNode.push( new IrradianceNode( materialLightMap ) );
 
 		}