Mostly aesthetic, but the Compressed Blocks on the map does not reflect what they look like. The map shows all Compressed Blocks as light grey.

Yes, I am a stickler for this kind of detail.

This fixes the basic issue. If you'd like to do better colour matching, you can provide the MapColor you think looks best for each block and we can use those.

Eventually ran a test world with 807, here's what I think:

Fiery Metal: Either MapColor.GOLD or MapColor.BLACK_STAINED_HARDENED_CLAY
Carminite: Either MapColor.RED or MapColor.TNT

Forgot about that, sorry. Better colours added in 9bf29f6.