Patchwork 3D Enterprise 2021.1 X5

Substitution

Use a lighting layer when you have multiple geometric versions of your model. For example, you might be working on a seat that can be marketed with or without a headrest. Without a lighting layer, you must calculate the lightmap for the whole model. When you view the version with no headrest, however, the zone where the headrest would have been remains black: no lightmap was calculated for this zone.

To correct this, use a lighting layer.