On 8/25/25 15:52, Cousin Ricky wrote:
> Cousin Ricky <ric### [at] yahoo com> wrote:
>>
>> Does anyone know how to get rid of that dark band across the spectrum
>> above the light source? It is not an object casting a shadow; it is the
>> light source itself that is creating the shadow. There is no such
>> shadow in Bruno's render.
>
> I now see that this is related to the "Light beam won't refract from outside
> media container" I posted in p.bugreports, and WFP has responded to that. I
> believe the shadow was caused by non-photon media interaction with the light
> source.
>
> But for some reason, the unrefracted light beam isn't showing.
Interesting! I didn't even try 'media_interaction off' because I didn't
think any actual scattering contribution could darken the media photons
like that. I don't understand what is happening with the calculated
scattering value where we have collected media photons...
This scene unlike the bug report one doesn't have the photon path cross
back over the scattered media path...
(The initial beam probably isn't showing up because it depends
completely on the scattering result - but I don't 'see' the geometries
well enough to be sure.)
Out of time. I'll try to look at this again tomorrow
Bill P.
Post a reply to this message
|
