Hi Conal, I've tried some links, e.g. the pre-compiled components from http://conal.net/Pan/Releases/2000-12-06/ or the interactive presentation from http://conal.net/Pan/papers.htm , but file not found. Do you have the files? Would be easier than trying to setup Haskell and Visual C++ environment for compiling it (looks like the sources link works). BTW: There is Visual Studio Express, maybe you want to update your webpage, because Microsoft gives it away for free, if it can be used with Pan. How fast is your implementation? I've downloaded "werkkzeug" from http://www.theprodukkt.com/werkkzeug1#25 . The user interface is a bit unusual, but if you start the tutorial, it can display a texture example with about 50 composed functions and 256x256 pixels with about 300 fps. I've emailed the author and they didn't revealed much about the implementation, but said it was C with some inline assembler. I assume to make it fast, a good idea would be to cache some calculations, e.g. if you want a swirl effect, for all destination image cache all source positions, for the desired destination image size. Regards, Frank