Ok, the situation goes like this: I have a 800x800 map image created with Render Map. What I would like to do is distort the whole image so it fits a robinson projection map (http://en.wikipedia.org/wiki/Robinson_projection), Winkel Tripel http://en.wikipedia.org/wiki/Winkel_Tripel_Projection) or similar. Essentially what I'm looking for is away of curving the corners of a square, or turn a square/rectangle into a circle/oval. Is anyone aware of a script/plugin that would be suitable for what I am attempting? I'm using GIMP 2.4. Thanks.