In an upcoming release, chisel will be removing the "oredict variants" feature, as it causes too many bugs to be worth while. Everything is much cleaner when the conversion between ItemStack/IBlockState is done by the variation supplier.

The new IMC API is documented here: https://github.com/Chisel-Team/Chisel/blob/1.10/carving_refactor/src/main/java/team/chisel/api/IMC.java#L49-L90 (subject to change)

This new API is still a work in progress, so if something is missing that you need, please let me know.

You can safely add this IMC and release your mod, if a user has an older chisel version it will simply be ignored.

I hope "marble" is the correct group for marble as i saw that being used in the "tests" in the main chisel class :P Support added.

i have to add: chisel of a astral sorcery marble block lead to a crash to desktop in ATM3 modpack. crash report can be provided if needed.

That in the current comment is about as helpful as "crash, plz help"

you have to at least provide a crashlog when experiencing a crash. open a new issue for this maybe aswell since it doesn't belong here.