Feeding a lightmap through the subsurface channel?

[Aitolda]

My team are pretty deep using glb as our primary format, but it’s come up lately that we need a way to include lightmaps in our projects, however this is not supported natively with glb. So I’m thinking feed it to the subsurface channel, and in blender set a custom property like “subsurface becomes lightmap” on an object, possible a second property to specify which material.(subsurface_as_lightmap = True, or something like this) Is it feasible to tell babylon to look at said custom property on a material by material basis to feed that lightmap through? I can’t see a reason we’d want both a lightmap and a subsurface texture on our environments. For the record I am not a coder and ask this question as an environment artist.

[Evgeni_Popov]

I think this post should help you:

Lightmaps / Shadowmaps / Tiled Textures

@theblackneko, you can certainly create a shadow map for a material using tiled textures utilizing a second UV set. You would have the tiled UVs in the first set and the unique unwrap in the second set which the shadow map is assigned to. In Babylon.js, you can assign light maps to PBRMaterial (which would be what you would have importing a glTF). The way to assign the lightmap to be a shadow map is to set PBRMaterial.useLightmapAsShadowmap = true and then assign the UV set with PBRMaterial.lig…