From what I understand, Lumen works with distance field, so it has the same issues as every other distance field related features, like DFAO, based on the quality of the distance field of the meshes.
- Thin meshes don’t works well because they don’t take enough space and will have bad distance field representation. Walls needs to be made of two planes, not just one, and thickness has to be more than 10cm
- Large meshes needs to get higher distance field resolution to get a good distance field representation.
- Complex meshes (like a big house made of only one mesh) have low distance field representation, even with high resolution so you have to cut it in smaller parts.