When running BetterMC, in combination with Bluemap, I realized that some blocks from Immersive Weathering were not rendering properly.
Thankfully, Immersive Weathering has the ability to dump the generated resources directly from the mod settings.
I slapped this together right quick and it seems to fix all the missing blocks.
INSTRUCTIONS:
1. Download.
2. Put in config/bluemap/resourcepacks in your MC server
3. reboot server
4. run /bluemap purge <mapname>
5. let it re-render.
This was made with a 1.19.2 Fabric instance, and this is all I have personally tested with this.