ZaK wrote:




this is difficult to compare based on your explanation, the scenes
are setup very differently (why is the object enclosed in a opaque
box in the second scene, where is disc?). Some peculiarities are the
distance of the sun (1.4 units) and the extreme color in the
first version (30000 * White?)

Also, using a sun position based on time is not suitable for
testing purposes. You should try to make a simple repeatable scene
based on the first scene with point area light, then use that light
source at a position specified by sun pos, if that still works
using the light_source from sun pos. don't change other parts
such as landscape unless it works. do visualize the position
of the sun as it might not be where you think it is.

Multifile samples are more conveniently provided as zip.

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