Octane preview not working in viewport

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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)
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Braca
Licensed Customer
Posts: 78
Joined: Mon May 23, 2016 12:43 pm

Hello all,

we are having a weird problem in Octane Blender. Tried reinstalling, tried different drivers, etc.
This is the issue:
Image
linograndiotoy
OctaneRender Team
Posts: 1350
Joined: Thu Feb 01, 2018 7:10 pm

Which OctaneRender version are you using?
Custom build or addon version?
Which NVIDIA drivers?
In which case are you getting this error?
Braca
Licensed Customer
Posts: 78
Joined: Mon May 23, 2016 12:43 pm

So basically we tried with a lot of different Octane Blender Versions, a lot of different drivers for nvidia gpu.
Seems like after fresh install of windows something happens in the d3d11.dll while using octane blender and then it never powers up. We need to do again a fresh install of win.
Any solution is welcomed.
linograndiotoy
OctaneRender Team
Posts: 1350
Joined: Thu Feb 01, 2018 7:10 pm

Are you installing the Studio Version of the NVIDIA drivers?
By the way, this looks more like a general system problem, not a specific Octane for Belnder issue.
Please try to download and execute OTOY's OctaneBench and let us know if it works fine:
https://render.otoy.com/octanebench/
Use the 2020.1 version.
Braca
Licensed Customer
Posts: 78
Joined: Mon May 23, 2016 12:43 pm

So we did track down the issue, and found a workaround of some sort.
We did try both Studio and Game drivers from nvidia, it was not about that.

So we have RTX3080Ti and RTX3090 in that machine, it seems that Windows somehow decides to run OpenGL when running blender on one of those 2 cards. When we get that error we can see it is stating problem with 3090, then we just force run OpenGL on 3080Ti and it work without any problems. After a while when it states the same problem with 3080Ti we just force run OpenGL on 3090 and it works fine. My guess is that something is messing up with the drivers between windows/octane/blender and not releasing the d3d11 or something for octane to use.

Hope this helps someone.
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