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