Problem with light intensity in tight spots (indirect lighting?) [ARCHVIZ]

Development Rendering
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1

Hello,

I have problem with, as I assume, indirect lighting, or tweaked editor values. I do use bounce cards in my project, with high intensity spotlight (70000). I have placed lightmass portals only in windows, and tweaked the worldsettings and baselightmass.ini

112333-screenshot_5.png

And baselightmass with tweaked values (production quality build) :

NumHemisphereSamples=32
DirectIrradiancePhotonDensity=600
IndirectPhotonDensity=4000
IndirectIrradiancePhotonDensity=2000
NumHemisphereSamplesScale=16

The result is a good lighting, but with the highlights in the tight spots, when the objects are close to the walls (not in every case). You can see those highlights on following :

112334-screenshot_1.jpg
112334-screenshot_1.jpg1919×1035 302 KB

112335-screenshot_2.png
112335-screenshot_2.png1063×812 689 KB

112336-screenshot_3.png
112336-screenshot_3.png799×889 545 KB

I do not have any light leaks, my meshes are stick together and this “backlight” happens even behind the painting, for no reason. Maybe it has something to do with the scale of photons? How to repair this?

2

Hmm… That’s the same issu i have :frowning:

3

Hi Einz and maSZynke,

After messing around with this for a few and using your lightmass.ini and world settings I’ve not been able to reproduce this in the realistic rendering demo Epic made available or in a blank project. It’s likely it could be some content issues or lighting setups that isn’t a problem in these.

If either of you have a sample project that can reproduce the issue you’re having here I’d be happy to look. Also, I tired in 4.13, so there could have likely been an issue with an older release like 4.11. Though, I’m not sure what version maSZynke is using.

-Tim