WebGPURenderer: Fix displacement-map shadows (#33774)

src/renderers/common/Renderer.js

@@ -3499,6 +3499,9 @@ class Renderer {
 		let materialDepthNode;
 		let materialPositionNode;
 		let materialSide;
+		let materialDisplacementMap;
+		let materialDisplacementScale;
+		let materialDisplacementBias;
 
 		const previousSourceMaterial = this._currentSourceMaterial;
 
@@ -3521,6 +3524,9 @@ class Renderer {
 			materialDepthNode = ( overrideMaterial.isNodeMaterial ) ? overrideMaterial.depthNode : null;
 			materialPositionNode = ( overrideMaterial.isNodeMaterial ) ? overrideMaterial.positionNode : null;
 			materialSide = scene.overrideMaterial.side;
+			materialDisplacementMap = overrideMaterial.displacementMap;
+			materialDisplacementScale = overrideMaterial.displacementScale;
+			materialDisplacementBias = overrideMaterial.displacementBias;
 
 			if ( material.positionNode && material.positionNode.isNode ) {
 
@@ -3530,6 +3536,9 @@ class Renderer {
 
 			overrideMaterial.alphaTest = material.alphaTest;
 			overrideMaterial.alphaMap = material.alphaMap;
+			overrideMaterial.displacementMap = material.displacementMap;
+			overrideMaterial.displacementScale = material.displacementScale;
+			overrideMaterial.displacementBias = material.displacementBias;
 			overrideMaterial.transparent = material.transparent || material.transmission > 0 ||
 				( material.transmissionNode && material.transmissionNode.isNode ) ||
 				( material.backdropNode && material.backdropNode.isNode );
@@ -3584,6 +3593,9 @@ class Renderer {
 			scene.overrideMaterial.depthNode = materialDepthNode;
 			scene.overrideMaterial.positionNode = materialPositionNode;
 			scene.overrideMaterial.side = materialSide;
+			scene.overrideMaterial.displacementMap = materialDisplacementMap;
+			scene.overrideMaterial.displacementScale = materialDisplacementScale;
+			scene.overrideMaterial.displacementBias = materialDisplacementBias;
 
 		}