I haven't been using Blender for a long time and keep coming back to some problems that give me headaches. In this case I have the following parameters:
- Render engine: Eevee
- Integrated HDRI environment
- My project is an apartment
The underside of a surface takes on its color due to the reflection of the HDRI environment, that means my ceiling is not white, like the material properties, but olive green due to the reflection of the green background of my HDRI environment.
In my case, the underside of my floor is olive green which doesn't matter because I can't see the underside of the floor through the camera. The top of my floor has the right material property. So far so good. The problem is the ceiling, because the visible surface of the ceiling is not white, but olive green - see picture.
At first I thought I had a problem with two-sided surfaces and I only had to assign "flip normals" to the surface in Blender / Editmode / Mesh / Normals and the problem would be solved, but it wasn't.
The problem is really strange, since the reflection on the floor could still be explained to me but not on the ceiling, which means that the reflection shines through other meshes.
Do I have to change something in the settings? Can you help me?