I would like to add a picture containing a square to my project in Illustrator. The square in the picture is slightly warped, and I would like to align it to my artboard.
I can use a envelope with a n x n mesh, but then the mesh does not align to the square. So, I created a mesh of size equal to the image, where 4 sub mesh-points correspond to the corners of the square. The result I get by applying this mesh using "from top layer" is wrong, as can be seen in the images below (original image from: http://commons.wikimedia.org/wiki/File:Chess_set_4o06.jpg).
Is there a way of anchoring the mesh-points in a non-rectangular way?