What kind of ways there are to cut off rendering time? Longer render time equals higher quality. Though most of the times in-game graphics would do the job I’m looking for. So I’m not looking for idea how to get totally rid of shadows and lights, but faster rendering.
Bake textures to your materials, set them to Shadeless and don’t use any lights. Use as many threads as you have cores available to render with. I don’t know of any faster way to render. You won’t get any shadows like this but it renders super fast.