16.2.2 - HDRI environment rotation stutters

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J.C
Licensed Customer
Posts: 1857
Joined: Thu May 13, 2010 6:35 pm
Location: Wrocław

Rotating HDRI environment in 16.x is still slower and jerky compared to previous versions like 15.2.6. There is constant information "Updating shaders" when rotation is performed.
15.x.x and previous was silky smooth.
CPU – i9 13900KF, 128GB RAM, GPU – RTX 4090
System – Windows 11
My Behance portfolio, Blender plugin FB support group
J.C
Licensed Customer
Posts: 1857
Joined: Thu May 13, 2010 6:35 pm
Location: Wrocław

With bigger HDRI maps like 8k or more the rendering pauses for a second or more until "Updating shaders" finishes.
CPU – i9 13900KF, 128GB RAM, GPU – RTX 4090
System – Windows 11
My Behance portfolio, Blender plugin FB support group
DrawFun
OctaneRender Team
Posts: 379
Joined: Fri Aug 25, 2017 5:02 am

Hi J.C,

We've fixed an environment hdri update issue in 16.2.2. And I've tested it in internal build 16.2.3 for both windows and mac but fail to reproduce this case.
Could you please give a bit more details about this issue? Thanks.

Cheers,
DrawFun
J.C
Licensed Customer
Posts: 1857
Joined: Thu May 13, 2010 6:35 pm
Location: Wrocław

Hi DrawFun,

Download high resolution environment file preferably 8k or 16k.
https://hdrihaven.com/hdri/?h=portland_landing_pad

Set it as an environment texture. Add or create some objects, preferably 10 or more with different materials.
Try to rotate the environment. There will be constant "Updating shaders" and freezes after finishing rotation or changing map parameters.
Last edited by J.C on Thu Sep 13, 2018 9:52 pm, edited 1 time in total.
CPU – i9 13900KF, 128GB RAM, GPU – RTX 4090
System – Windows 11
My Behance portfolio, Blender plugin FB support group
J.C
Licensed Customer
Posts: 1857
Joined: Thu May 13, 2010 6:35 pm
Location: Wrocław

Here is the screencast from Blender plugin and standalone app. It shows the environment update with 8k file and 10 objects and materials. Everything updates after 10 seconds. The same scene updates instantly in Standalone app.
Attachments
looong update.mp4
Update in Standalone
(4.84 MiB) Downloaded 2356 times
instant update.mp4
Update in plugin
(34.41 MiB) Downloaded 2355 times
CPU – i9 13900KF, 128GB RAM, GPU – RTX 4090
System – Windows 11
My Behance portfolio, Blender plugin FB support group
J.C
Licensed Customer
Posts: 1857
Joined: Thu May 13, 2010 6:35 pm
Location: Wrocław

I've found the reason of such behaviour. When the texture colour depth is set to "Automatic" is causes the freezes. Setting it to 16bit or 32bit makes it smooth again.
In 15.2.6 it was ok with "automatic"
Attachments
instant update plugin.mp4
15.2.6 with "automatic" and no freezes
(12.45 MiB) Downloaded 2355 times
CPU – i9 13900KF, 128GB RAM, GPU – RTX 4090
System – Windows 11
My Behance portfolio, Blender plugin FB support group
DrawFun
OctaneRender Team
Posts: 379
Joined: Fri Aug 25, 2017 5:02 am

Hi J.C,

I've tested 16.2.4 under win/mac/linux and it seems ok.
Thank you very much for your effort in making videos and detailed reports!

Cheers,
DrawFun
J.C
Licensed Customer
Posts: 1857
Joined: Thu May 13, 2010 6:35 pm
Location: Wrocław

Yes, the fix for automatic is working.
CPU – i9 13900KF, 128GB RAM, GPU – RTX 4090
System – Windows 11
My Behance portfolio, Blender plugin FB support group
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