This scene has a baked lightmap and the props have a URP/Lit shader. If the Metallic Map is not applied then the lightmap’s lighting and AO appear on the props. When I add a metallic map lighting and AO disappear. Changing the Smoothness slider does not impact the visibility of the lightmap.
The metallic map was exported from Substance Painter. I’ve tested the built in “URP (metallic standard)” export option and created my own export based on the Unity documentation for what the URP/Lit shader is expecting per channel. I’ve inverted the roughness to smoothness in Photoshop when using my custom export.
After reading countless posts on lightmapping and Unity lighting I can’t find an answer to this? Am I misunderstanding a core concept here? How can I achieve a metallic map and include the lightmap data on the props?
