When trimming armor using roze quartz, smoky quartz, or sulfur quartz as materials with either Flow or Bolt smithing templates engulf the armor model texture with a missing texture.

Fabric, Minecraft 1.21.1, Cinderscapes 5.0.2

I probably just forgot to add them. Trims are so much better starting in 1.21.4. I'll take a look at this when I have some time.

Fixed in version 5.0.3.