Global Illumination

Choose one of the following:

Develop a software that perfoms the radiosity method for a simplistic 3D scene, for instance a rectangular room (seen from the inside) with a lit quadrangle on one face (i.e., the window). Visualize the result using colored vertices (DirectX: CustomVertex.PositionColored).
Develop a ray tracer that can render an infinitely extended checkerboard ground plus a set of chrome spheres, whose positions and radii are read from a text file.