zlacelle wrote:

> When I switch to a single light source, even when it's a parallel light source,
> the scene is VERY dark.  I have a sky sphere which is emitting ambient and
> diffuse lighting, and if I didn't have this then the scene would be almost
> black.

Ideally the sun should be an area_light such that its apparent
diameter is about 0.5 degrees. Note that the color does not max
out at 1 you can make it as bright as you want.

Adding some radiosity may also improve the lighting.

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