sun/distant light reflection

Use this forum for general user support and related questions.
Post Reply
User avatar
lacilaci
Donor
Posts: 1806
Joined: Fri May 04, 2018 5:16 am

sun/distant light reflection

Post by lacilaci » Mon Jan 06, 2020 2:49 pm

scaling sun is visible in reflection, this looks terrible in cases where you can easily see the reflected sun/distant light.

indeally, as the sun would get bigger it would also get blurrier in reflection (as if behind clouds) so that we don't see a weird huge sharp ball when we need soft shadows from sun.

The other option would be keep sun small in reflection while large as a source of lighting.

Or best have control over how big the sun is in refl. and/or how sharp reflection it does...

Is this doable?

chafouin
Posts: 47
Joined: Wed Jan 24, 2018 9:35 pm
Location: Tokyo

Re: sun/distant light reflection

Post by chafouin » Tue Jan 07, 2020 4:03 am

lacilaci wrote:
Mon Jan 06, 2020 2:49 pm
indeally, as the sun would get bigger it would also get blurrier in reflection (as if behind clouds) so that we don't see a weird huge sharp ball when we need soft shadows from sun.
Changing the blurriness of the reflection is something that is controlled by material roughness and should never be controlled on the light.
One thing that could help though is just giving a small edge falloff on that sun disk so it doesn't look too sharp.

I would rather get a way to disable sun specular to rely on an HDRI reflection instead, although I don't think it's possible with bidir. Not being able to control light path visibilities is a big drawback in LuxCore in my opinion, but that's the way it is.

User avatar
lacilaci
Donor
Posts: 1806
Joined: Fri May 04, 2018 5:16 am

Re: sun/distant light reflection

Post by lacilaci » Tue Jan 07, 2020 5:10 am

chafouin wrote:
Tue Jan 07, 2020 4:03 am

One thing that could help though is just giving a small edge falloff on that sun disk so it doesn't look too sharp.
Oh yes, that's what I'm asking for. Poor wording.
I would rather get a way to disable sun specular to rely on an HDRI reflection instead, although I don't think it's possible with bidir.
No, I definitely wan't sun reflecion in most cases...
Not being able to control light path visibilities is a big drawback in LuxCore in my opinion, but that's the way it is.
Yes, I made this request long time ago: https://github.com/LuxCoreRender/LuxCore/issues/148

provisory
Posts: 227
Joined: Wed Aug 01, 2018 4:26 pm

Re: sun/distant light reflection

Post by provisory » Tue Jan 07, 2020 10:50 am

chafouin wrote:
Tue Jan 07, 2020 4:03 am
...but that's the way it is.
Image

Post Reply