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I have been trying to rig the blender human base mesh hand for a personal project. It has been working fine, but when I reached painting the tip of the ring finger (bone ring_3), I can't paint anymore. It only works if I hide the verticies which I had been using as reference to keep it even. I have tryied painting in other vertex groupes and it does the same thing, although it didn't before (I did unlock them). I am not very familiar with wheight paint having only used it when following blender guru's dohnut tutorial and while playing around. I have rigged a few mechanical models for which I simply added verts to the vert groups. Does anyone know what is wrong?

screenshots of my project:

this doesn't paint enter image description here this does work but I don't have reference enter image description here

As I said I have little knoledge about wheight painting, the button I pressed to see the verts (top left next to view dropdown) might have other purposes which I don't know about, I just pressed it to see what it did and thought it was handy. Thanks ;)

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What you think is just showing vertices is actually a selection mask:

enter image description here

That's why you can't paint everywhere with this enabled. It is meant to be used as a way to paint only on a specific area which you determine with your selection in Edit Mode.

If you want to be able to paint anything while having the mask enabled, ↹ Tab into Edit mode and press A to select everything, then ↹ Tab back to weight paint mode.

Alternatively, you can enable the wireframe overlay:

enter image description here

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  • $\begingroup$ Just to add to this great answer, you can select vertices in weight paint mode, although the tools are more limited than edit and recent version have not been kind to default weight paint selection hotkeys. $\endgroup$
    – Nathan
    Commented Dec 5, 2023 at 17:14

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