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Op 09/08/2022 om 19:09 schreef MichaelJF:
> Am 09.08.2022 um 17:16 schrieb William F Pokorny:
>> On 8/9/22 10:50, Thomas de Groot wrote:
>>> Op 9-8-2022 om 14:53 schreef Thomas de Groot:
>>>> initially, I wanted to concentrate on the hdr light sources though...
>>>>
>>> ...and when I do, no photons are generated!
>>>
>>> I use
>>> photons {
>>> refraction on
>>> reflection on
>>> }
>>>
>>> for the sphere with the hdr map, identical to the code for the light
>>> source. Decreasing spacing down to a ridiculously small value doesn't
>>> change anything. I must be missing something here...
>>>
>>
>> I'm perhaps not following, but...
>>
>> Taking your hdr sphere to be an actual hollow sphere, you are making
>> it a photon target for any photon light sources by adding the photon
>> block above. In other words - as far as I know - there is no way to
>> shoot photons from other than a traditional light sources.
>>
>> Aside: I've never tried to shoot photons from a light source inside a
>> hollow object at the inside surface of that object. I'm not sure it
>> would work given the how the radial 'shooting pattern' is aimed at
>> target objects. Perhaps this the reason why you get no photons? Hmm,
>> maybe a spot light would work... Too long since I've played with photons.
>>
>> Bill P.
> Unfortunatelly, Bill seems to be right. I tried a bit, but it seems to
> be impossible to persuade a HDRI light to cast photons, so we need POV
> 4.0 ;)
>
That was also the conclusion I reached.
POV 4.0, where are you? :-)
--
Thomas
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