Fixed displacementmap_vertex. I think...

src/renderers/shaders/ShaderChunk/displacementmap_vertex.glsl

@@ -1,5 +1,5 @@
 #ifdef USE_DISPLACEMENTMAP
 
-	transformed += objectNormal * texture2D( displacementMap, uv ).x * displacementScale;
+	transformed += normal * texture2D( displacementMap, uv ).x * displacementScale;
 
 #endif