Thanks for paster and canvas R0J0hound, wonderful plugins.
I am trying to do a perspective adjustment tool: takes a photo of a building and makes a flattened version of its facade. It is something that you can see in action on the youtube video (look for video # shIplS95nyk, i can't post links yet...), and in the below screengrab.
I've started laying out something (attached capx) but obviously haven't figured out what to do next... any ideas? Somebody?
The main problem is the fact that there seems to be no way of having a trapezoidal canvas or paster, so there is no way to capture the original distorted facade before stretching it back to a square...