Fix wrong shadows with morphs

Author: Popov72

packages/dev/core/src/Materials/shaderMaterial.ts

@@ -910,7 +910,7 @@ export class ShaderMaterial extends PushMaterial {
             defines.push("#define USE_VERTEX_PULLING");
 
             const indexBuffer = renderingMesh.geometry?.getIndexBuffer();
-            if (indexBuffer) {
+            if (indexBuffer && !(renderingMesh as Mesh).isUnIndexed) {
                 defines.push("#define VERTEX_PULLING_USE_INDEX_BUFFER");
                 if (indexBuffer.is32Bits) {
                     defines.push("#define VERTEX_PULLING_INDEX_BUFFER_32BITS");

packages/dev/core/src/ShadersWGSL/iblVoxelGrid.vertex.fx

@@ -163,7 +163,7 @@ fn main(input : VertexInputs) -> FragmentInputs {
 
 #include <morphTargetsVertexGlobal>
 let inputPosition: vec3f = positionUpdated;
-#include <morphTargetsVertex>(vertexInputs.position\\),inputPosition))[0..maxSimultaneousMorphTargets]
+#include <morphTargetsVertex>(vertexInputs.position\\),inputPosition),vertexInputs.vertexIndex,vertIdx)[0..maxSimultaneousMorphTargets]
 
 #include <instancesVertex>