When using the keystone plugin for surface mapping the texture gets warped in a large triangular polygon. If you apply a "billboard" transform before the transform of the vertices(corners) of the quad it will look smoother and the texture that is mapped to it will appear where it should with minimal distortion.
(edit-- what I know as a billboard transform (from vvvv, QC,etc), is just normalized coordinate system. would be faster to go straight to the point, which Im sure one of you will put your head into, because this software is redonculously awesome, and extremely thought out, big thanks.)
