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.

I think Alien Biomes support may have broken in a more recent version of it. This is what I get when using the latest version of each on a 2.0 (not Space Age) game:

Failed to load mods: __show-coal-rocks__/data-updates.lua:4: attempt to index field 'rock-huge-dustyrose' (a nil value)
stack traceback:
    __show-coal-rocks__/data-updates.lua:4: in main chunk

Mods to be disabled:
• show-coal-rocks (0.0.5)

This should now be fixed, sorry for the delay. Like the base game, they changed the name of the rocks from rock-huge-<colour> to huge-rock-<colour>.

I'm going to look for a better way of handling this to make it more generic, but still getting to grips with lua (as I basically only use it to keep this mod up and running)