Interior Lighting (in Blender Internal)

I’ve been asked many times for this tutorial – most people thought that it was impossible to do this in Blender Internal, but as always, I like to prove them wrong.

Of course, its not perfectly realistic, but it is definitely adequate and realistic enough that a non-CG-oriented-person will see it as realistic.

Find out how to:
Make soft shadows from the sun
Use ambient occlusion and environment lighting simultaneously
Create atmospheric light
Included Tip: Clay rendering