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Noise on edges of Shadow Passes

PostPosted: Sat May 20, 2017 10:07 pm
by colinleiker
I've tried to find the answer to this myself, but I've looked all over and can't seem to find a solution.

My issue is I get noisey edges when rendering Shadow Passes in the Render Layer system. I've attached a screenshot of my scene showing the issue, as well as my settings.

I've played with every level of samples, specular depth, ray epsilon, caustic blur, GI clamp, and coherent ratio. Nothing gets rid of them. I've done the trick where I fill the scene with a ton of even light and than just reduce the exposure to my desired lighting, but they still appear. Enabling "Only Side Effects" seems to get rid of them, but then it shows shadows behind the objects that I do not want to see. Also it adds weird "scratch marks" in the shadows on the bottom of objects. Also I have no idea wtf this setting is meant for, so I'm hesitant to use it.

Anyone got a clue? Thanks!

Re: Noise on edges of Shadow Passes

PostPosted: Sun May 21, 2017 7:15 am
by aoktar
I can't check that detailed but you should check that in a compositing software after comping not in LV or PV. And search for similar topics with answers.

Re: Noise on edges of Shadow Passes

PostPosted: Sun May 21, 2017 2:50 pm
by niestudio
see this thread viewtopic.php?f=30&t=56386&start=10#p301206

Black dots will not show when your shadow layer is underneath your object in compositing.

Re: Noise on edges of Shadow Passes

PostPosted: Thu May 25, 2017 4:30 pm
by colinleiker
aoktar wrote:I can't check that detailed but you should check that in a compositing software after comping not in LV or PV. And search for similar topics with answers.


Yea when I bring it into AE it just looks the same :/ As I said, I wouldnt be posting here had I not already searched for similar topics haha. Couldn't find anything.

niestudio wrote:see this thread viewtopic.php?f=30&t=56386&start=10#p301206

Black dots will not show when your shadow layer is underneath your object in compositing.


Unfortunately they are still very noticeable. Especially when I am using a transparent material to generate shadows (example: piece of clear tape peeling off the wall will cast slight shadows, which are completely unusable in Octane as the pixelated edges looks terrible).

Re: Noise on edges of Shadow Passes

PostPosted: Fri Jun 09, 2017 3:12 pm
by bepeg4d
Hi colinleiker,
I suspect that you are experiencing the same issue reported innthis other discussion, and will be fixed in the next update of SDK:
viewtopic.php?f=30&t=61674#p315608
ciao beppe

Re: Noise on edges of Shadow Passes

PostPosted: Sat Jun 15, 2019 4:39 pm
by Whispermode
Devs - please confirm: this is still a problem, even in 2019.1 XB2, right?

Render Layer Pass - Layer Shadow Edge Noise.JPG


Render Layer Pass -  Layer Reflection Edge Noise.JPG

Re: Noise on edges of Shadow Passes

PostPosted: Wed Jun 19, 2019 3:02 pm
by bepeg4d
The residual internal noise will be covered by the beauty pass on top.
What is important is to have a clean result outside of the alpha of the Render layer, for shadows and reflections.
ciao Beppe