Don't know the answer to your question but have you tried messing around with the renderer editor (ctrl +r) or the material editor (in menu)?I have a question on a lighting effect. There are some maps that have built-in lighting with a variable intensity, in that it fluctuates back and forth repeatedly. This is often used in fireplaces. How can I put this variable intensity in my own lights that I add? I cannot figure this out.
I can mention that these built-in map lights with variable intensities cannot be adjusted in F5, which makes me think this setting is elsewhere.
I am really stumped here.