Fix thin instance bounding info computation (#8740)

src/Lights/Shadows/cascadedShadowGenerator.ts

@@ -826,6 +826,8 @@ export class CascadedShadowGenerator extends ShadowGenerator {
 
         const world = mesh.getWorldMatrix();
 
+        effect.setMatrix(matriceNames?.world ?? "world", world);
+
         world.multiplyToRef(this.getCascadeTransformMatrix(this._currentLayer)!, tmpMatrix);
 
         effect.setMatrix(matriceNames?.worldViewProjection ?? "worldViewProjection", tmpMatrix);

src/Meshes/thinInstanceMesh.ts

@@ -301,7 +301,7 @@ Mesh.prototype.thinInstanceRefreshBoundingInfo = function(forceRefreshParentInfo
         }
     }
 
-    boundingInfo.reConstruct(TmpVectors.Vector3[0], TmpVectors.Vector3[1]);
+    boundingInfo.reConstruct(TmpVectors.Vector3[0], TmpVectors.Vector3[1], this.getWorldMatrix());
 };
 
 Mesh.prototype._thinInstanceUpdateBufferSize = function(kind: string, numInstances: number = 1) {