Blender 2.93 Eevee woes #88878

New Issue

Irvine McMinn · 2021-06-06T08:27:14+02:00

Irvine McMinn commented

2021-06-06 08:27:14 +02:00

Hardware and OS:

Arch Linux → Gnome Wayland, ( I checked problem exists with Xorg and Nvidia-Prime)

My relevant hardware is as follows

  • Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz
  • Intel Corporation Skylake GT2
  • NVIDIA Corporation GM108M [GeForce 930M]

Description:

My distro, Arch, updated to Blender 2.93 a few days ago. Unfortunately, There appears to be a couple of, (probably related,) problems with Eevee and Viewport rendering.

Firstly, in the Eevee render, the ‘RMB → shade-smooth’ operator is not being applied. Neither is it being applied in the ‘viewport → materials’ view, although it is being applied in the ‘viewport → solid’ view.

Secondly, Lighting and shadows are seriously off: Previously, with 2.92, I could get roughly comparable results using the same lighting setup for fast Eevee test renders and the finished Cycles render. With the current release, this is not even remotely possible.

There is a bug report, (FS#71110,) about Blender 2.93 needing ‘opencolorio 2.0’ for colour management, but I checked this is not the source of the problem by downloading the self-contained ‘tar.xy’ file and installing it to /usr/local/bin. This fixed the reported bug, but did nothing for my problem.

Steps To Reproduce:
I posted a description of the problem to the https://bbs.archlinux.org/viewtopic.php?id=266912 asking if anyone else had experienced this problem, but, since no-one else seems to be affected, I believe it may be hardware specific.

I have attached a renders from Cycles and Eevee, where you can see quite clearly that the Eevee render is not shading smooth and how the lighting is seriously off.

system-info.txt

Hardware and OS: Arch Linux → Gnome Wayland, ( I checked problem exists with Xorg and Nvidia-Prime) My relevant hardware is as follows ``` • Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz • Intel Corporation Skylake GT2 • NVIDIA Corporation GM108M [GeForce 930M] ``` Description: My distro, Arch, updated to Blender 2.93 a few days ago. Unfortunately, There appears to be a couple of, (probably related,) problems with Eevee and Viewport rendering. Firstly, in the Eevee render, the ‘RMB → shade-smooth’ operator is not being applied. Neither is it being applied in the ‘viewport → materials’ view, although it is being applied in the ‘viewport → solid’ view. Secondly, Lighting and shadows are seriously off: Previously, with 2.92, I could get roughly comparable results using the same lighting setup for fast Eevee test renders and the finished Cycles render. With the current release, this is not even remotely possible. There is a bug report, (FS#71110,) about Blender 2.93 needing ‘opencolorio 2.0’ for colour management, but I checked this is not the source of the problem by downloading the self-contained ‘tar.xy’ file and installing it to /usr/local/bin. This fixed the reported bug, but did nothing for my problem. Steps To Reproduce: I posted a description of the problem to the https://bbs.archlinux.org/viewtopic.php?id=266912 asking if anyone else had experienced this problem, but, since no-one else seems to be affected, I believe it may be hardware specific. I have attached a renders from Cycles and Eevee, where you can see quite clearly that the Eevee render is not shading smooth and how the lighting is seriously off. [system-info.txt](https://archive.blender.org/developer/F10159611/system-info.txt) ![Blender-2.93-Eevee.png](https://archive.blender.org/developer/F10159606/Blender-2.93-Eevee.png) ![Blender-2.93-Cycles.png](https://archive.blender.org/developer/F10159605/Blender-2.93-Cycles.png)

Irvine McMinn commented

2021-06-06 08:27:14 +02:00

Added subscriber: @IrvineHimself

Chris D commented

2021-06-07 05:00:22 +02:00

Added subscriber: @CheesecakeCG

Chris D commented

2021-06-07 05:00:22 +02:00

You're going to need to break these up into separate issues and use a more descriptive title for each. I had two of these same issues, and I had to manually look through the recent bug reports to by guessing mostly to find this.

The issue you mentioned about OpenColorIO was specific to the Arch package and has already been fixed. Just be sure to change any files you edited to with broken version back to the View Transform and Look you had set before, saving a file over with the broken packages would have erased that information.

The shading issue happens when you have AO, SSR Refraction in Post Processing, and SSR Refraction in the material settings enabled. I've tried it on an RX460 and an HD 5500, both on Arch Linux, but separate machines. Here's a file that demonstrates this:
AO-Refraction-Regression.blend

You're going to need to break these up into separate issues and use a more descriptive title for each. I had two of these same issues, and I had to manually look through the recent bug reports to by guessing mostly to find this. The issue you mentioned about OpenColorIO was specific to the Arch package and has already been fixed. Just be sure to change any files you edited to with broken version back to the View Transform and Look you had set before, saving a file over with the broken packages would have erased that information. The shading issue happens when you have AO, SSR Refraction in Post Processing, and SSR Refraction in the material settings enabled. I've tried it on an RX460 and an HD 5500, both on Arch Linux, but separate machines. Here's a file that demonstrates this: [AO-Refraction-Regression.blend](https://archive.blender.org/developer/F10160467/AO-Refraction-Regression.blend)

Irvine McMinn commented

2021-06-07 08:17:58 +02:00

Thank you for your reply.

You have given me a lot to thing about here. After playing around with your blend, viewing from different angles and distances while switching things off and on, I was able to see what you what you mean.

Actually, I didn’t have AO and SSR Refraction enabled in either material settings or in post-processing. However by playing around with various settings and viewing angles in my blend, I was easily able to reproduce in Cycles the effects which are bugging me in Eevee.

This ‘reverse confirmation’ does strongly suggest that my problems are mainly being caused by bad lighting which, by coincidence, just happened to work without apparent problem in 2.92. Or, to rephrase, improvements to Eevee in 2.93 highlighted problems with my blend which were not apparent in 2.92.

Having said that, while I do not have the technical skill to adequately isolate or describe the problem, but noting that the appearance of objects with the ‘shade-smooth’ operator applied are radically different in ‘viewport → shade-solid’ and ‘viewport → shade-material’, I cant shake the intuitive feeling that there is something off about shade-smooth.

For the moment, I am going to work on the lighting and materials settings of my model and see if I can eliminate the worst of the problems.

Further, if I have further information about the ‘shade-smooth’ operator, I will take to heart your comments about separating issues and more descriptive titles.

Irvine

Thank you for your reply. You have given me a lot to thing about here. After playing around with your blend, viewing from different angles and distances while switching things off and on, I was able to see what you what you mean. Actually, I didn’t have AO and SSR Refraction enabled in either material settings or in post-processing. However by playing around with various settings and viewing angles in my blend, I was easily able to reproduce in Cycles the effects which are bugging me in Eevee. This ‘reverse confirmation’ does strongly suggest that my problems are mainly being caused by bad lighting which, by coincidence, just happened to work without apparent problem in 2.92. Or, to rephrase, improvements to Eevee in 2.93 highlighted problems with my blend which were not apparent in 2.92. Having said that, while I do not have the technical skill to adequately isolate or describe the problem, but noting that the appearance of objects with the ‘shade-smooth’ operator applied are radically different in ‘viewport → shade-solid’ and ‘viewport → shade-material’, I cant shake the intuitive feeling that there is something off about shade-smooth. For the moment, I am going to work on the lighting and materials settings of my model and see if I can eliminate the worst of the problems. Further, if I have further information about the ‘shade-smooth’ operator, I will take to heart your comments about separating issues and more descriptive titles. Irvine

Irvine McMinn commented

2021-06-09 07:53:44 +02:00

Okay, by playing about with ‘material settings’ I was able to resolve all my problems with ‘shade-smooth’. I am still having a few minor problems with rendering artefacts in Eevee, but I am fairly certain this is also my fault.

Thanks for you insightful help,

Irvine

Ps:

I would be grateful if someone can mark this closed.

Okay, by playing about with ‘material settings’ I was able to resolve all my problems with ‘shade-smooth’. I am still having a few minor problems with rendering artefacts in Eevee, but I am fairly certain this is also my fault. Thanks for you insightful help, Irvine Ps: I would be grateful if someone can mark this closed.

Irvine McMinn commented

2021-06-09 07:54:17 +02:00

Changed status from 'Needs Triage' to: 'Resolved'

Irvine McMinn closed this issue

2021-06-09 07:54:17 +02:00

Irvine McMinn self-assigned this 2021-06-09 07:54:17 +02:00

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Blender 2.93 Eevee woes #88878