you need to take a UV snapshot in maya (in the editor file>uv snapshot) then you will know exactly where to paint. Remember the rule of thumb is that your texture should be twice the maximum size it will be on screen at any time. So if it's 1k on screen then the texture should be minimum 2k to avoid blurring
:ninja;
Alan
Technical Director - Framestore
Currently working on: Your Highness
IMDB