There are many great software that allow us to calculate the light intensity and its environment. This studio can take us a while creating material, calculating light position and, our unforgettable lover, time machine calculation before finding our first viable sketch. But, can Blender give us some kind of prototype rendering scene to solve that?
Let's try with some thing very easy: a cube, a plane, several lights and an empty. Then, an animation or a game engine trick allows creating a scene without rendering time. Don't forget to activate GLSL on display and rendering with textures.
See the result: