On 24-6-2015 20:01, clipka wrote:
> Am 24.06.2015 um 16:08 schrieb Thomas de Groot:
>
>> That said, and in keeping with off off-topic, I have trouble with an
>> emission sphere replacing a Sun light_source in a scene. Whatever the
>> emission value, the scene remains fairly dark and no shadows seem to be
>> cast. Using UberPOV. What about this, Christoph?
>
> Using an emissive sphere instead of a light_source for the sun - while
> being proper PBR - is not a good idea performance-wise: The sun is quite
> small in the sky, and most rays will miss it. I suspect that's the
> underlying cause for your problem.

I suspected something like this. I shall experiment with alternative 
settings as you suggest. However, it probably will be more efficient to 
render the Sun with an area_light.

Thanks indeed!

-- 
Thomas

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