Perspective grid

[Cyrille Berger]

Thanks to john and thomas :) Now I have a clear idea of what I will do.
So lets start by why we (I ?) want a perspective grid:
1) for the cloning tool (and maybe some other tool, like rectangle, circle...)
2) for perspective transformation
3) and as a visual guide for painting (that was the reason I wanted it in the 
first place)

Here is my solution: the perspective grid is an object associated with a 
layer, a little bit like the selection mask. And then the tools (or the user) 
can use it for whatever they want.

Some links:
illustrator: http://www.khulsey.com/demo_1howto.html
photoshop: 
http://www.graphics.com/modules.php?name=Sections&op=viewarticle&artid=267
gimp: http://www.pedroalonso.es/mockups/plot2f.png
-- 
--- Cyrille Berger ---