Am 27.02.2016 um 18:08 schrieb ThH:
> Am 27.02.2016 um 17:17 schrieb William F Pokorny:
> 
>> Christoph,
>>
>> I think it has something to do with the light type.
>>
>> // <--- Fails 3.7.1-alpha.8454683 Ubuntu 14.04  (OK with 3.7.0-stable)
>> // light_source {<-150, 0.5, 0>, color rgb < 1.2, 1, 1.5>
>> //     spotlight radius 0.3 falloff 0.35 point_at < 0, 0.5, 0>
>> //     photons {refraction on reflection on}
>> // }
>> // <--- OK Ubuntu 14.04 3.7.0 & 3.7.1
>>     light_source {<-150, 0.5, 0>, color rgb < 1.2, 1, 1.5>
>>         photons {refraction on reflection on}
>>     }
>>
>> Perhaps someone else can verify ?
> 
> Tried it...
> 
> Yes. The resulting image differs, bit still not right.
> 
> I've attached my rendering.

Looks ok to me (except that the "original" light should cover the entire
height of the image's left side, but I'm pretty sure that's an entirely
different problem). Where the light streams past the block at the upper
edge of the image it's totally normal that we get bright white light.

I think it might well be worth toying around with the spotlight some more.

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