Chaos Corona for Cinema 4D > [C4D] Bug Reporting

Weird artefacts in low light situations

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Cinemike:
Win 10, R19.053 Studio, Corna Beta 1 Release

Load the scene and render, there you are: artefacts.
Well, the only appear if you use a sky with really, really low settings, but when playing with a situation only lit by candles (and when I wanted to add a bit fading skylight) I stumbled across them.
The sky's intensity is 0.001, with a brighter sky the artefacts won't appear. It does not matter either if I use an intensity of 1 and REALLY lower the color values in a Rawa-Fake sky or if I use a Corona Light material with an HDRI where I really lower exposure or intensity - the artefacts will come over you.

Just saying.

CU
Michael, trying to break things

TomG:
Interesting, they don't show up in IR.

Cinemike:
Interesting indeed, I did not try it with IR. The original scene is too heavy for my modest PC to make sense with IR. But this gives hope it is something that can be fixed.

TomG:
I am sure it will lead to diagnosing and then fixing it :) There have been other threads about things that look different in IR vs final render, so perhaps the underlying cause is the same. Just wanted to note that IR didn't have the artifacts as that may point to the cause and fix!

Cinemike:

--- Quote from: TomG on 2018-02-19, 18:39:12 ---I am sure it will lead to diagnosing and then fixing it :) There have been other threads about things that look different in IR vs final render, so perhaps the underlying cause is the same. Just wanted to note that IR didn't have the artifacts as that may point to the cause and fix!

--- End quote ---

I appreciate this!
But it could have been a limitation with extremely low values as well (I keep stumbling over "limitations" with other software all the time ;)), so I am glad it is not (because of the IR) and I am glad it will be taken care of :)

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