Foilage and grass is grey in frame block

This is because the texture of those blocks (and a few others) change color depending on the biome. This should eventually be fixed but is a very low priority right now.

Start by reproducing the grey foliage and grass in the frame block, then locate the texture and biome-dependent color handling in the project. Confirm the intended behavior with the maintainers; done means the affected blocks no longer render grey when their biome changes their color.

Written by the indexing model from the issue text.