I'm trying to set up a scene with materials which have an albedo color and a lightmap texture. The lightmap texture contains baked light and allows me to change the color on the model without having to render the lighting again.
When I do this with the classic lighting mode it works fine. In the texture dropdown for the lightmap I pick the RGB option instead of the Luminance and my lightmap is multiplied with the diffuse color. So far so good.
When I try this in PBR mode my lightmap goes black. So I look for the RGB option again in the texture dropdown, but it isn't there. Is there a special way I have to render my lightmaps to make them work in PBR?