In this video I explain how easy is to struggle with Masking Ids in Blender, and how to fix this issue using Easy Material Mask, available in the links bellow:
Gumroad: https://wcarige.gumroad.com/
Also, If you are interested in some Geometry Nodes Generators to make your life easier as a 3d artist, check my tools here:
Blender Market: https://blendermarket.com/creators/wc...
Gumroad: https://wcarige.gumroad.com/