I was hoping it was a feature already (I may still be missing something obvious but just incase)

Having the ability to blacklist an entire mods blocks from forming blood stained blocks through a wildcard asterik or similar would be a handy feature to have, it would save pack devs or just normal players adding 50+ lines to a config when one line could disable it for every block in said mod.

Chisel for example which doesn't play well with your rendering would only need a player to blacklist chisel:* instead of chisel:cobblestone, chisel:cobblestone1, chisel:cobblestone2 etc. etc.