This is the documentation for Enlighten.
Reserved texture samplers
When a material is used with Enlighten lightmaps, the number of texture samples allowed in the material is reduced. This can cause an error when compiling the shaders for a material with many texture samples.
When a material has Used With Enlighten Lightmaps selected in Details > Usage:
- the number of available texture samplers is reduced
- if the target shader profile supports shared samplers, only one sampler is reserved
- if the target shader profile doesn't support shared samplers, the number of reserved samplers increases with the Lightmap Display Quality chosen in Project Settings > Enlighten
| (Mobile) Lightmap Display Quality | SM5 | SM4 | METAL_MRT | METAL_SM4 | ES2 | METAL |
|---|---|---|---|---|---|---|
High | 1 | 1 | 1 | 1 | 3 | 4 |
Medium | 1 | 1 | 1 | 1 | 2 | 3 |
Low | 1 | 1 | 1 | 1 | 1 | 2 |
If you know the material is never used with a mesh that's lit using lightmaps, disable Used With Enlighten Lightmaps to increase the number of available texture samplers.