Weight paint brush does nothing to my mesh For some reason, my weight paintbrush doesn't do anything. I am using Rigify, the free Blender addon to create a rig. I used automatic weights and then go from there. I tried to weigh paint it but even though my brush is at 100% it doesn't have any effect on any part of the mesh. It won't turn the blue to red and vice versa. I am sure it's not the addon itself as it just creates the rigs, plus it's a pretty common addon. Thanks in advance
It seems that you have 'Vertex selection masking for painting' ON.



Either turn that OFF or go to edit mode to select some vertices.

I hope this helps