Lightmap build for selected objects only.

[Zeblote]

@anonymous_user_fbe2d247

Not really. In path tracing you start bunch rays from camera and intersect with geometry and then send bunch of rays from intersect points. In lightmap rendering you would just start rays from lightmap texels and only care about diffuse rays. It’s just texture space lighting instead of screenspace lighting.

Are you sure this is how it works? I read a while ago that lightmass uses photon mapping, so even if you only wanted a lightmap for one object you would still have to do half the work for a whole scene.