Prevent specular highlight

Unity Engine
1

I have a sphere with a small hole in it. The hole is modeled with a black circle in the AO map. This looks fine until a specular highlight is drawn on top of it. How do I locally block any specular highlight?

I suppose it is a combination of making the circle full rough and modifying the normal map, but I am not sure how the normal map should look like.

2

set the alpha channel to 0 in the main texture in the wanted region

3

Specular masking? A specular map (Classic) / metallic map (PBR) will do.

2 Likes
4

Now, that is a good idea :slight_smile: