Problem with Shadow Mattes and Denoiser

Sub forum for bug reports
Forum rules
Before posting a bug report, please check the following:
1. That the issue has not already been disclosed
2. That the issue is specific to this plugin, and not Octane in general (Try reproducing it in Standalone)
Bugs related to the Octane Engine itself should be posted into the Standalone Support sub-forum.

All bug reports should include the information below, along with a detailed description of the issue and steps to reproduce it.
A. Operating System, including version (i.e. Win 7, OSX 10.11.2, Ubuntu 14.04, etc.)
B. Graphics Card(s) model (i.e. GTX 580 - 3GB, TITAN, etc.)
C. RAM Capacity (i.e. 6 GB)
D. Nvidia driver version (i.e. 7.50, 7.5.22)
E. OctaneRender Standalone version, if installed (i.e. 2.24.2, 2.23, etc.)
F. OctaneRender plugin version (i.e. v2.25 - 2.21)
G. Host application version, including build number if available (i.e. 3ds Max 2016 Build 18.0)
Post Reply
User avatar (Default)
richardyarlett
Licensed Customer
Posts: 197
Joined: Thu Apr 09, 2015 8:48 pm

Problem with Shadow Mattes and Denoiser
***************************************

In the last few versions of the plugin I can see we have a Problem with Shadow Mattes and the Denoiser. You can see from these two screenshots that once the denoiser runs, it massively reduces the density of the shadow on the shadow matte. It basically seems to erase 75% of it. This is a new problem.
Attachments
DENOISED
DENOISED
STANDARD
STANDARD
Top
User avatar
paride4331
Octane Guru
Posts: 3808
Joined: Fri Sep 18, 2015 7:19 am

Hi,
check the alpha channel in Kernel panel.
Regards
Paride.
2 x Evga Titan X Hybrid / 3 x Evga RTX 2070 super Hybrid
Top
User avatar (Default)
richardyarlett
Licensed Customer
Posts: 197
Joined: Thu Apr 09, 2015 8:48 pm

I am still having a big problem with this topic. When I render to a shadow catcher, it works perfectly until I denoise the pass,and most of the shadows on the floor are massively reduced. How to I prevent this ?

Also the shadow is NOT denoised. It has been this way for years. I am just not sure what is happening. What is the workflow to get a clean normal shadow with denoiser ?
Last edited by richardyarlett on Mon Jul 03, 2023 10:09 pm, edited 1 time in total.
Top
User avatar (Default)
richardyarlett
Licensed Customer
Posts: 197
Joined: Thu Apr 09, 2015 8:48 pm

x.jpg
Top
User avatar (Default)
richardyarlett
Licensed Customer
Posts: 197
Joined: Thu Apr 09, 2015 8:48 pm

ff.jpg
If I used it with Alpha, The shadow is much better preserved, but I still get the NOISE, even with Denoiser. The denoiser does not seem to work with the shadow catcher at all. Please explain...
Top
User avatar
paride4331
Octane Guru
Posts: 3808
Joined: Fri Sep 18, 2015 7:19 am

Hi richardyarlett,
Have you tried looking at this?
viewtopic.php?f=30&t=79874#p412692
Regards
Paride
2 x Evga Titan X Hybrid / 3 x Evga RTX 2070 super Hybrid
Top
User avatar (Default)
richardyarlett
Licensed Customer
Posts: 197
Joined: Thu Apr 09, 2015 8:48 pm

Ok I checked that. It does not really help. It doesn't work for my workflow at all. There is no reason I should be using AOVs just to get a simple shadow catcher to work.

Let me state my question again. Why does the denoiser not work on the Shadow Catcher ?
Top
User avatar
paride4331
Octane Guru
Posts: 3808
Joined: Fri Sep 18, 2015 7:19 am

Hi richardyarlett,
Octane Render developers are aware of the denoised shadow issue.
They're working to implement a new denoiser to fix it.
Regards
Paride
2 x Evga Titan X Hybrid / 3 x Evga RTX 2070 super Hybrid
Top
Post Reply

Return to “Bug Reports”