I've come across an issue while weight painting a model. After getting the hang of things, suddenly the tools stop working. I can't add or erase influence at all. Closing and opening the program doesn't help.

This person seems to be having the same problem, but I can't find anyone else with the issue.

Help?

EDIT: after smacking the computer a coupl times, I've found that the weight painting tool will erase or add influence in some areas, but not others. How do I make it NOT do that?

The only thing I can think of is if you have anti-aliasing set on your video card. That screws up selection and vertex painting.

This may be common sense but, always make sure that there is influence from some bone on every vertex. You cannot remove weight from a vertex if no other bone has influence on that vertex.

Ayatollah:

This may be common sense but, always make sure that there is influence from some bone on every vertex. You cannot remove weight from a vertex if no other bone has influence on that vertex.

That's interesting and explains a lot. I'm sure that knowledge will come in handy in the future, however, this issue started when I foolishly decided that I should try painting 100% weight over a mesh in certain areas. When I realized that it was both stupid and unnecessary to do that, I tried erasing it and couldn't.

Hale:

Ayatollah:

This may be common sense but, always make sure that there is influence from some bone on every vertex. You cannot remove weight from a vertex if no other bone has influence on that vertex.

That's interesting and explains a lot. I'm sure that knowledge will come in handy in the future, however, this issue started when I foolishly decided that I should try painting 100% weight over a mesh in certain areas. When I realized that it was both stupid and unnecessary to do that, I tried erasing it and couldn't.

Yes that is because of my point. You painted 100% to a vertex, so only 1 bone has 100% influence over that vertex. When you try to erase that influence you can't because you would then leave that vertex with no influence from any bone, XSI does not allow this.

What you must do, instead of trying to erase the 100% inflence, is to select another bone and apply influence onto that vertex. You will then be able to erase the other influence if you wanted.