Hi there.
With Doobes' magnificent new pub released, I feel like modeling again. However, I have a few problems with lighting in Blender.
Right now, my Age does not contain any texture, I'm mostly experimenting with light.
So, I set up a single sun, lighting a half-sphere like dome. This dome does not have specularity, no ambient light, no vertex color, nothing. The sun shines approximately at 45 degrees from vertical.
Results are as follow:
As you can see, this dome is divided in 3 parts by the light. A black zone (1), a mid-gray zone (2), and a bright gray zone (4).
It's weird because there is no smooth transition from part 1 to part 2 and 4 (except the vertex transition, of course). Plus, there is a bright line in 3 which is not specularity, and there are two lit zones: 2 and 4. Since I have only a single light in the scene which is the sun, I really don't understand that.
Because of that, I decided to erase most of what's in my Age, set up a new sun and a new sphere with a new material (still no vertex color or specularity, but a bit of ambient light).
It might be a bit hard to see on the picture, but again there is a bright line in 3. The bright side behaves fine (maybe because it's too bright to see anything). But now the dark area is divided in two. Part 4 is gray, which is fine. Part 1, however is darker, and is located on the lower hemisphere. Which doesn't make any sense since my sun shines at 45 degrees from vertical.
I already ran away screaming after experimenting with how point lights work a while ago, but now I really feel tired of all this. Any idea what might be wrong ? I can't see any additional light hiding anywhere in my Age. I think my version of PyPRP is up-to-date (it seems I can't access the wiki right now).
And this is the reason I don't like building on Uru. We're using an old version of Blender, a very old game engine, and no matter what you do, it seems there is always an additional error getting in the way.
EDIT: Also, I'm wondering: there is no way to use vertex color on shaded objects, is it ? I would like to add AO to vertices, but it seems it only works when no light is affecting the object.