@Tobi216 There are multiple factors here, and it’s not a bug, more like a rendering difference between Unity/three.js:
-
Your environment light is set to “Gradient” which results in a very uniform environment response. Setting it to “Skybox” shows the Normal Map.
-
There are no realtime lights in your scene at all. Adding a directional light will show the Normal Map.
We generally recommend using “Skybox” as environment lighting mode for better look, is there a specific reason for the gradient here?