Ok so I’ve started on a test/learning project and have the following issues:
The “glosiness” slider in the material editor doesn’t make any difference, the reflection coming from the environment slot is always sharp no matter what. The other material parameters seem to be responding.
I created and imported a lightmap and from what I can see it’s recognized the uv 1 after troubleshooting but there is zero effect of any kind in viewport object when lightmap is added and ticked in the material settings.
Skybox doesn’t seem to have any effect on anything, apart from showing in the background. the materials have “use skybox” ticked. I need to plug the cubemap into the environment slot of each individual material instead.
Materials with a color just turn grey or black with a reflection
If Model (legacy) component is on I can see the geometry, if I add and change it to the “Render” component the box disappears entirely.
I forked the project briefly to play with your materials. I do see the lightmap appearing on the 3D model, but it’s fighting against your diffusemap and metalness/glossiness settings. Here I turned down the metalness and you can see it start to appear dimly: