ziggie opened this issue on Aug 05, 2009 · 761 posts
bagginsbill posted Thu, 06 August 2009 at 10:02 PM
No that's not right, quite. Almost.
Stewer says if you enable GI, the AO on a light is automatically ignored, effectively disabled, so you do not need to touch it, because it has become irrelevent.
However, AO on a shader is NOT ignored, and should only be there for the purposes of detecting crevices, not to do shadows. This is an advanced technique that I rarely see, so you can just assume that if you have an Ambient_Occlusion node in your shader, going into any sort of Diffuse_Value, it should be removed.
As for the shadows, glowing (ambient) objects do cast shadows with GI. Shadow casting happens anytime something blocks the view to another source of light, including self-lit things, as well as externally lit things. The diffuse reflections from one surface to another can be blocked by an intervening surface. It happens naturally as a result of the algorithm.
Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)