As stated in the title, the ability to add blockstates as valid heat sources would make for useful intercompatibility options for modpack makers, one such example:

Better with mods stoked flame

Thanks a lot! to be sure, do I declare "state" as a string or as an IIblockState using bracket handlers?

IBlockState

Heating.addStateSource(state, heat_value);

Also added configurable molding material

I was wondering what the new update added lol