Alien Biomes has its own coal rocks which go under the names rock-huge-(color). Can you add those as well in case of Alien Biomes.

I can certainly look into that for you when I have some free time, hopefully this week!

0.0.3 should now support Alien Biomes... not entirely sure I did it the right way but... it seems to work?

You miss two of them volcanic and tan. There are 13 variants of huge rock in Alien Biomes you got 11 of them.

Oh blast, good catch. I thought I had miscounted somewhere. I'll add them shortly.