The new block models have an option that resource pack makers can set to give the specified block an overlay via colormap on selected sides (similar to leaves and grass)
- Give individual blocks a specific colormap and overlay texture
- Choose what sides of the block get the overlay
- "Extra Overlays" option in Video Settings menu that toggles custom overlays to be on/off
Justification and Use Case:
The ability to add the overlay feature would greatly increase the variety of resource packs. Instead being stuck with monotonous colors, we could things like plants have more change for the biome they're in. Biomes could become colder with bluish stone, and more vibrant with yellow birch trees. The idea for this is to add beauty to game, and it could even be used later on for a seasons system (theoretically).
Too many overlays could induce lag