I'd like to recommend a feature to disable the ash patches in the basalt deltas feature when the mod Phantasmic as it also adds its own ashen basalt blocks in the Nether. To prevent overlap, could there be a disabling of the feature when Phantasmic is detected? (similar to how quark disables a feature with overlap its detected)

hm i can look into it but ash would still be doubled so does it make any sense? Feature can still be disabled via configs in older versions and datapacks in newer ones as all worldgen can

I'll ask the devs of phantasmic if they can add the tag so even though there's 2 of them there will still be compat in recipes. I just thought it would be a good feature since people won't have to go into the datapack to do s.

i might add forge ash tags since some mods have it but f you do want supplementaries ash (otherwise you would have turned it and its feature in the config off) then you would still need to have a way to disable their ash and overriding their recipes to use tags or mine so datapack here is ineditable regardless

yeah true it's up to you. I just mainly envisioned the quark feature or autodisabling as a quick solution :p