GPUCASTER

It uses your GPU to quickly render highly-detailed, arbitrary 3D isosurfaces (functions) with semi-realistic lighting (5 point light sources with ambient occlusion). The C++ source code is provided, but you probably won't need it; you can modify the camera and lights using the mouse and keyboard, and you can modify the core function (that describes the 3D isosurface, or "world") by editing a single pixel shader (shaders/eval.hlsl). If you know the basics of 3D math and how to program pixel shaders, you'll be making awesome stuff in minutes! And once you get something you like, you can render it at huge resolutions (up to 8192 x 8192).