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Michael Klein (Renderbricks)
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User Since
Mar 10 2017, 7:13 PM (254 w, 3 d)

Recent Activity

Dec 15 2021

Michael Klein (Renderbricks) added a comment to T68920: Cycles: improve shadow terminator handling.

Thanks to @Mikhail Matrosov (ktdfly) this is now much improved in 3.0.
https://wiki.blender.org/wiki/Reference/Release_Notes/3.0/Cycles#Shadow_Terminator

It's always possible to improve this further, but I will lower the relative priority for now.

Dec 15 2021, 7:07 PM · Render & Cycles, Cycles, BF Blender

Nov 25 2021

Michael Klein (Renderbricks) updated the task description for T93382: Subsurface passes incorrectly created in .blend files from old Blender versions.
Nov 25 2021, 6:18 PM · Render & Cycles, BF Blender
Michael Klein (Renderbricks) created T93382: Subsurface passes incorrectly created in .blend files from old Blender versions.
Nov 25 2021, 5:25 PM · Render & Cycles, BF Blender
Michael Klein (Renderbricks) added a comment to T93310: Compositor: Crash due to broken image paths.

I can repro this on both master and 3.0, doesn't crash after the first tab though, takes a few, stack trace is identical to the one @Pratik Borhade (PratikPB2123) posted on both builds.

Not crashing anymore in 3.0.0 Beta, branch: master, commit date: 2021-11-23 18:03, hash: rB3844e9dbe771.

Nov 25 2021, 12:00 PM · Compositing, BF Blender

Nov 24 2021

Michael Klein (Renderbricks) added a comment to T93310: Compositor: Crash due to broken image paths.

I can repro this on both master and 3.0, doesn't crash after the first tab though, takes a few, stack trace is identical to the one @Pratik Borhade (PratikPB2123) posted on both builds.

Nov 24 2021, 4:47 PM · Compositing, BF Blender
Michael Klein (Renderbricks) added a comment to T93321: Blender 3.0 splash screen scene will rendered incorrectly.

~@Michael Klein (Renderbricks) your build is prior to the fix Bastien committed. Can you double-check if the problem persist? Here it seems to be fixed.~ intersection persist

Nov 24 2021, 4:44 PM · Modeling, BF Blender (3.0)
Michael Klein (Renderbricks) added a comment to T93310: Compositor: Crash due to broken image paths.

The issue seems to be fixed in the actual version: 3.0.0 Alpha, branch: master, commit date: 2021-10-26 23:24, hash: rB8d8ce6443530.

Nov 24 2021, 9:25 AM · Compositing, BF Blender
Michael Klein (Renderbricks) added a comment to T93321: Blender 3.0 splash screen scene will rendered incorrectly.

The version: 3.0.0 Alpha, branch: master, commit date: 2021-10-26 23:24, hash: rB8d8ce6443530 seems to handle the splash screen scene as expected now except the hairs of the character.

Nov 24 2021, 9:21 AM · Modeling, BF Blender (3.0)

Nov 23 2021

Michael Klein (Renderbricks) added a comment to T93321: Blender 3.0 splash screen scene will rendered incorrectly.

Thanks for finding working version, I was unable to find one locally. Will bisect exact commit

Nov 23 2021, 9:03 AM · Modeling, BF Blender (3.0)
Michael Klein (Renderbricks) added a comment to T92878: Latest Nvidia Game driver 496.13/496.49 cause crashes +++ Studio driver 472.39 works.

This report does not contain all the requested information, which is required for us to investigate the issue.

Please submit a new report and carefully follow the instructions. Be sure to provide system information, Blender version, the last Blender version which worked, and a .blend file with exact steps to reproduce the problem.

A guideline for making a good bug report can be found at https://wiki.blender.org/wiki/Process/Bug_Reports

Nov 23 2021, 8:57 AM · BF Blender
Michael Klein (Renderbricks) renamed T93321: Blender 3.0 splash screen scene will rendered incorrectly from Blender 3.0 splash screen scene will be shown incomplete and rendered incorrectly to Blender 3.0 splash screen scene will appear incomplete and rendered incorrectly.
Nov 23 2021, 8:53 AM · Modeling, BF Blender (3.0)
Michael Klein (Renderbricks) renamed T93321: Blender 3.0 splash screen scene will rendered incorrectly from Blender 3.0 splash screen scene will be rendered incorrectly to Blender 3.0 splash screen scene will be shown incomplete and rendered incorrectly.
Nov 23 2021, 8:53 AM · Modeling, BF Blender (3.0)
Michael Klein (Renderbricks) added a comment to T93321: Blender 3.0 splash screen scene will rendered incorrectly.

In 3.0.0 Beta, branch: master, commit date: 2021-11-22 23:55, hash: rBf749506163b7 the scene looks like this. Incomplete with teeth intersection.

Nov 23 2021, 8:45 AM · Modeling, BF Blender (3.0)
Michael Klein (Renderbricks) updated the task description for T93321: Blender 3.0 splash screen scene will rendered incorrectly.
Nov 23 2021, 8:41 AM · Modeling, BF Blender (3.0)
Michael Klein (Renderbricks) created T93321: Blender 3.0 splash screen scene will rendered incorrectly.
Nov 23 2021, 8:20 AM · Modeling, BF Blender (3.0)

Nov 22 2021

Michael Klein (Renderbricks) added a comment to T92880: Compositor crashing when rendering.

This might be on a different page, could you report this again separately?

Nov 22 2021, 9:04 PM · BF Blender
Michael Klein (Renderbricks) created T93310: Compositor: Crash due to broken image paths.
Nov 22 2021, 9:03 PM · Compositing, BF Blender
Michael Klein (Renderbricks) added a comment to T92880: Compositor crashing when rendering.
Nov 22 2021, 12:48 PM · BF Blender

Nov 16 2021

Michael Klein (Renderbricks) updated the task description for T93127: Compositor: Incomplete Rendering of MultiLayer EXR composition.
Nov 16 2021, 2:43 PM · BF Blender
Michael Klein (Renderbricks) created T93127: Compositor: Incomplete Rendering of MultiLayer EXR composition.
Nov 16 2021, 2:42 PM · BF Blender

Nov 10 2021

Michael Klein (Renderbricks) added a comment to T92880: Compositor crashing when rendering.

In the build blender-3.0.0-beta+v30.7b530c609611-windows.amd64-release the crash is fixed but frames 2 and 3 of my attached scene will be rendered incomplete.

Nov 10 2021, 4:44 PM · BF Blender

Nov 6 2021

Michael Klein (Renderbricks) added a comment to T92880: Compositor crashing when rendering.

Triaging note: The file opens in the compositor workspace. Sometimes after clicking into another workspace, the Nodes in the Compositor will all be disconnected when I click back.

There is no Camera in the Scene. The compositor is instead reading an Multilayer OpenEXR Image sequence of 3 frames, none of which are packed in the file.
There is the Blue Moviecache bar present in the Image editor when the OpenEXR file is selected.
There also is a Motion Tracking Workspace, with a Solved Camera Track, Belonging to a .mov Movie Clip that also isn't packed in the file.

Nov 6 2021, 9:32 PM · BF Blender
Michael Klein (Renderbricks) updated the task description for T92880: Compositor crashing when rendering.
Nov 6 2021, 3:40 PM · BF Blender
Michael Klein (Renderbricks) updated the task description for T92880: Compositor crashing when rendering.
Nov 6 2021, 3:40 PM · BF Blender
Michael Klein (Renderbricks) created T92880: Compositor crashing when rendering.
Nov 6 2021, 3:39 PM · BF Blender
Michael Klein (Renderbricks) created T92879: Compositor crashing when rendering.
Nov 6 2021, 3:38 PM · BF Blender
Michael Klein (Renderbricks) updated the task description for T92878: Latest Nvidia Game driver 496.13/496.49 cause crashes +++ Studio driver 472.39 works.
Nov 6 2021, 3:29 PM · BF Blender
Michael Klein (Renderbricks) created T92878: Latest Nvidia Game driver 496.13/496.49 cause crashes +++ Studio driver 472.39 works.
Nov 6 2021, 3:28 PM · BF Blender

Sep 22 2021

Michael Klein (Renderbricks) added a comment to T91613: Blender 3.0 Alpha with Cycles X: OptiX GPU rendering artifacts with large plane.

Sep 22 2021, 8:19 PM · BF Blender
Michael Klein (Renderbricks) added a comment to T85078: OptiX GPU rendering artifacts with large plane.

Please merge this latest bug report with Blender 3.0 Alpha and Cycles X (master branch): https://developer.blender.org/T91613

Sep 22 2021, 8:07 PM · BF Blender, Cycles, Render & Cycles
Michael Klein (Renderbricks) updated the task description for T91613: Blender 3.0 Alpha with Cycles X: OptiX GPU rendering artifacts with large plane.
Sep 22 2021, 8:06 PM · BF Blender
Michael Klein (Renderbricks) updated the task description for T91613: Blender 3.0 Alpha with Cycles X: OptiX GPU rendering artifacts with large plane.
Sep 22 2021, 8:06 PM · BF Blender
Michael Klein (Renderbricks) updated the task description for T91613: Blender 3.0 Alpha with Cycles X: OptiX GPU rendering artifacts with large plane.
Sep 22 2021, 8:06 PM · BF Blender
Michael Klein (Renderbricks) created T91613: Blender 3.0 Alpha with Cycles X: OptiX GPU rendering artifacts with large plane.
Sep 22 2021, 8:05 PM · BF Blender

Aug 13 2021

Michael Klein (Renderbricks) added a comment to T90143: Failed to build OptiX acceleration structure when using Image Sequence instead of Single Image with Geometry Nodes (with Motion Blur).

The geo nodes create for each pixel of the texture instanced cubes but in the end the instances will be merged into a mesh with a high number of polygons. The colors for each merged cube will be generated by face groups. I‘ve revised the setup now by keeping the instances and using a texture projection for the result. This lowers the VRAM usage dramatically but slows down the GUI and viewport performance because of thousands of instances. My original scene is much more complex with over 800.000 instanced cubes and for this bug report I reduced the scene and isolated the issue to a minimum.

Aug 13 2021, 1:05 AM · BF Blender

Aug 12 2021

Michael Klein (Renderbricks) added a comment to T90143: Failed to build OptiX acceleration structure when using Image Sequence instead of Single Image with Geometry Nodes (with Motion Blur).

UPDATE: Turning Motion Blur off will fix the OptiX Acceleration Structure issue.

Aug 12 2021, 7:59 PM · BF Blender
Michael Klein (Renderbricks) renamed T90143: Failed to build OptiX acceleration structure when using Image Sequence instead of Single Image with Geometry Nodes (with Motion Blur) from Failed to build OptiX acceleration structure when using Image Sequence instead of Single Image with Geometry Nodes to Failed to build OptiX acceleration structure when using Image Sequence instead of Single Image with Geometry Nodes (with Motion Blur).
Aug 12 2021, 7:58 PM · BF Blender
Michael Klein (Renderbricks) added a comment to T90143: Failed to build OptiX acceleration structure when using Image Sequence instead of Single Image with Geometry Nodes (with Motion Blur).

Thanks for looking into this. The RTX 3080 here has 16GB VRAM and it's just an issue in OptiX mode. In CUDA mode it works. The question is: Why is the image sequence taking double VRAM? What is the difference here?

Aug 12 2021, 3:23 PM · BF Blender
Michael Klein (Renderbricks) added a comment to T90143: Failed to build OptiX acceleration structure when using Image Sequence instead of Single Image with Geometry Nodes (with Motion Blur).

This is a pretty interesting bug worth taking a closer look at. The issue still exists and the only difference here is using a sequence or still.

Aug 12 2021, 1:40 PM · BF Blender

Jul 25 2021

Michael Klein (Renderbricks) updated the task description for T90143: Failed to build OptiX acceleration structure when using Image Sequence instead of Single Image with Geometry Nodes (with Motion Blur).
Jul 25 2021, 9:52 PM · BF Blender
Michael Klein (Renderbricks) created T90143: Failed to build OptiX acceleration structure when using Image Sequence instead of Single Image with Geometry Nodes (with Motion Blur).
Jul 25 2021, 9:41 PM · BF Blender

Apr 18 2021

Michael Klein (Renderbricks) updated the task description for T87606: Blender 2.93 Beta: Different Tile Colors with OptiX Hybrid Rendering.
Apr 18 2021, 9:52 PM · Render & Cycles, BF Blender
Michael Klein (Renderbricks) updated the task description for T87606: Blender 2.93 Beta: Different Tile Colors with OptiX Hybrid Rendering.
Apr 18 2021, 9:50 PM · Render & Cycles, BF Blender
Michael Klein (Renderbricks) created T87606: Blender 2.93 Beta: Different Tile Colors with OptiX Hybrid Rendering.
Apr 18 2021, 9:41 PM · Render & Cycles, BF Blender

Mar 30 2021

Michael Klein (Renderbricks) added a comment to T74883: Cycles crashes with Windows GPU Scheduling and 2 or more GPUs [driver bug].

This is my initial bug : https://developer.blender.org/T85317 , the issue is present on 2.93 alpha with the error :
Illegal address in cuCtxSynchronize() (device_cuda_impl.cpp:2049)Illegal address in cuGraphicsMapResources(1,$&pmem.cuPBOresource,0) (device_cuda_impl.cpp:2135)

Mar 30 2021, 6:18 PM · Render & Cycles, Cycles, BF Blender
Michael Klein (Renderbricks) added a comment to T74883: Cycles crashes with Windows GPU Scheduling and 2 or more GPUs [driver bug].

@Brecht Van Lommel (brecht) Thank you for keeping the one thread open... this problem has been here for quite a while now, i really hope theres a fix..

Mar 30 2021, 3:24 AM · Render & Cycles, Cycles, BF Blender

Mar 28 2021

Michael Klein (Renderbricks) added a comment to T68920: Cycles: improve shadow terminator handling.

@Michael bernardoff (kriptomik) EEVEE is using shadow mapping techniques and the Terminator Effect is a result of raytraced shadows.

Mar 28 2021, 9:39 PM · Render & Cycles, Cycles, BF Blender

Feb 27 2021

Michael Klein (Renderbricks) updated the task description for T86047: Bender 2.92 Release: Latest Demo file reports RTX error when building BVH.
Feb 27 2021, 12:08 PM · BF Blender
Michael Klein (Renderbricks) updated the task description for T86047: Bender 2.92 Release: Latest Demo file reports RTX error when building BVH.
Feb 27 2021, 11:42 AM · BF Blender
Michael Klein (Renderbricks) renamed T86047: Bender 2.92 Release: Latest Demo file reports RTX error when building BVH from Bender 2.92 Release: Latest Demo file reports RTX error to Bender 2.92 Release: Latest Demo file reports RTX error when building BVH.
Feb 27 2021, 11:42 AM · BF Blender
Michael Klein (Renderbricks) renamed T86047: Bender 2.92 Release: Latest Demo file reports RTX error when building BVH from Bender 2.92 Release: Latest Demo file reports RTX error / freezes in CUDA mode to Bender 2.92 Release: Latest Demo file reports RTX error.
Feb 27 2021, 11:14 AM · BF Blender
Michael Klein (Renderbricks) updated the task description for T86047: Bender 2.92 Release: Latest Demo file reports RTX error when building BVH.
Feb 27 2021, 10:54 AM · BF Blender
Michael Klein (Renderbricks) renamed T86047: Bender 2.92 Release: Latest Demo file reports RTX error when building BVH from Bender 2.92 Release: Latest Demo file reports RTX error to Bender 2.92 Release: Latest Demo file reports RTX error / freezes in CUDA mode.
Feb 27 2021, 10:50 AM · BF Blender
Michael Klein (Renderbricks) updated the task description for T86047: Bender 2.92 Release: Latest Demo file reports RTX error when building BVH.
Feb 27 2021, 10:45 AM · BF Blender
Michael Klein (Renderbricks) updated the task description for T86047: Bender 2.92 Release: Latest Demo file reports RTX error when building BVH.
Feb 27 2021, 10:39 AM · BF Blender
Michael Klein (Renderbricks) updated the task description for T86047: Bender 2.92 Release: Latest Demo file reports RTX error when building BVH.
Feb 27 2021, 10:39 AM · BF Blender
Michael Klein (Renderbricks) created T86047: Bender 2.92 Release: Latest Demo file reports RTX error when building BVH.
Feb 27 2021, 10:30 AM · BF Blender

Feb 22 2021

Michael Klein (Renderbricks) added a comment to T82351: Tile stealing glitches with adaptive sampling.

@Christoph Werner (Taros) The test with the AMD 1950X 16 core and GTX 1080Ti shows the following result:

Feb 22 2021, 6:57 PM · BF Blender (2.92), Render & Cycles, Cycles
Michael Klein (Renderbricks) added a comment to T82351: Tile stealing glitches with adaptive sampling.

@Christoph Werner (Taros) I made an extreme test with tiles of 512x512. This gives me the suspicion that the GPU takes over the tiles but renders them from scratch because the render time in this case with different Adaptive Sampling settings for a faster result was nearly the same.

Feb 22 2021, 6:50 PM · BF Blender (2.92), Render & Cycles, Cycles
Michael Klein (Renderbricks) added a comment to T82351: Tile stealing glitches with adaptive sampling.

Render times

Feb 22 2021, 6:22 PM · BF Blender (2.92), Render & Cycles, Cycles
Michael Klein (Renderbricks) added a comment to T82351: Tile stealing glitches with adaptive sampling.

Excuse my question, but which version is needed to test the tile stealing feature?
I've a nvidia RTX 3090 here and an AMD 3970X CPU with 32 cores. In my tests the "Candidate" version of Blender 2.92 has nearly no difference in rendering speed, or just marginal better.

Is the tile stealing feature implemented in the current 2.92 Candidate version or do I expect too much of this option?

From what I watch here 2.92 RC is using tile stealing. When the GPU has finished it will definitely take over the CPU tiles. From my logic it should be like this: If you have a slow CPU but a very fast GPU there is maybe not much of a difference between GPU only and hybrid mode. Because the GPU might solve the whole render while the CPU is still working on the first tiles. But if you have a very fast CPU there should be a difference. How fast is the AMD 3970X compared to the RTX 3090? I have a 16 core Threadripper and GTX 1080Ti which are equal in speed. I will do a test.

My AMD Ryzen Threadripper 3790X is slower then the RTX 3090. I guess there is no "consumer" CPU, that renders tiles faster than a nvidia RTX 3090 currently...
I have an old workstation with a 1080Ti and will make some tests there, soon. Currently my old machine is not ready to go.

Feb 22 2021, 6:05 PM · BF Blender (2.92), Render & Cycles, Cycles
Michael Klein (Renderbricks) added a comment to T82351: Tile stealing glitches with adaptive sampling.

Excuse my question, but which version is needed to test the tile stealing feature?
I've a nvidia RTX 3090 here and an AMD 3970X CPU with 32 cores. In my tests the "Candidate" version of Blender 2.92 has nearly no difference in rendering speed, or just marginal better.

Is the tile stealing feature implemented in the current 2.92 Candidate version or do I expect too much of this option?

Feb 22 2021, 5:48 PM · BF Blender (2.92), Render & Cycles, Cycles

Feb 6 2021

Michael Klein (Renderbricks) added a comment to T85421: Blender 2.91/2/3 freeze/crash with multiple cards (Viewport Shading only).

Can you check if the following setting is enabled in Windows settings? If it is, turn it Off, and try blender again.

Feb 6 2021, 8:58 PM · BF Blender
Michael Klein (Renderbricks) added a comment to T85421: Blender 2.91/2/3 freeze/crash with multiple cards (Viewport Shading only).

Can you check if the following setting is enabled in Windows settings? If it is, turn it Off, and try blender again.

Feb 6 2021, 8:11 PM · BF Blender
Michael Klein (Renderbricks) renamed T85421: Blender 2.91/2/3 freeze/crash with multiple cards (Viewport Shading only) from Blender 2.82/3 freeze/crash with multiple cards (Viewport Shading only) to Blender 2.91/2/3 freeze/crash with multiple cards (Viewport Shading only).
Feb 6 2021, 11:16 AM · BF Blender
Michael Klein (Renderbricks) updated the task description for T85421: Blender 2.91/2/3 freeze/crash with multiple cards (Viewport Shading only).
Feb 6 2021, 11:14 AM · BF Blender
Michael Klein (Renderbricks) renamed T85421: Blender 2.91/2/3 freeze/crash with multiple cards (Viewport Shading only) from Blender 2.82/3 freeze/crash with multiple cards (Viewport only) to Blender 2.82/3 freeze/crash with multiple cards (Viewport Shading only).
Feb 6 2021, 11:12 AM · BF Blender
Michael Klein (Renderbricks) renamed T85421: Blender 2.91/2/3 freeze/crash with multiple cards (Viewport Shading only) from Blender 2.82/3 freeze/crash with multiple cards to Blender 2.82/3 freeze/crash with multiple cards (Viewport only).
Feb 6 2021, 11:11 AM · BF Blender
Michael Klein (Renderbricks) updated the task description for T85421: Blender 2.91/2/3 freeze/crash with multiple cards (Viewport Shading only).
Feb 6 2021, 11:05 AM · BF Blender
Michael Klein (Renderbricks) created T85421: Blender 2.91/2/3 freeze/crash with multiple cards (Viewport Shading only).
Feb 6 2021, 11:00 AM · BF Blender

Feb 4 2021

Michael Klein (Renderbricks) added a comment to T85248: Blender 2.92/3: Cycles crash with older 2.9 scene (see log files).

Good to hear!

Will close then (feel free to comment again if issues returns)

Feb 4 2021, 12:02 PM · BF Blender

Feb 2 2021

Michael Klein (Renderbricks) added a comment to T85248: Blender 2.92/3: Cycles crash with older 2.9 scene (see log files).

Good to hear!

Will close then (feel free to comment again if issues returns)

Feb 2 2021, 7:18 PM · BF Blender

Feb 1 2021

Michael Klein (Renderbricks) added a comment to T85248: Blender 2.92/3: Cycles crash with older 2.9 scene (see log files).

Seems to be fixed in:
2.92.0 Beta, branch: master, commit date: 2021-01-31 13:31, hash: rBa9b53daf23ba
2.93.0 Alpha, branch: master, commit date: 2021-01-31 14:53, hash: rBb10fac0432c6

Feb 1 2021, 10:55 AM · BF Blender

Jan 31 2021

Michael Klein (Renderbricks) added a comment to T85248: Blender 2.92/3: Cycles crash with older 2.9 scene (see log files).

Overall 2.92/3 are rendering much faster. Fantastic. Here's the recording with the 2.92 log files. CUDA mode. Blender crashes when switching to another layer at the end.

Jan 31 2021, 12:42 PM · BF Blender
Michael Klein (Renderbricks) updated the task description for T85248: Blender 2.92/3: Cycles crash with older 2.9 scene (see log files).
Jan 31 2021, 12:35 PM · BF Blender
Michael Klein (Renderbricks) added a comment to T85248: Blender 2.92/3: Cycles crash with older 2.9 scene (see log files).

I had also a crash while loading the scene. The scene is using a linked scene. I will provide a recording.

Jan 31 2021, 12:30 PM · BF Blender
Michael Klein (Renderbricks) updated the task description for T85248: Blender 2.92/3: Cycles crash with older 2.9 scene (see log files).
Jan 31 2021, 12:28 PM · BF Blender
Michael Klein (Renderbricks) created T85248: Blender 2.92/3: Cycles crash with older 2.9 scene (see log files).
Jan 31 2021, 12:24 PM · BF Blender

Jan 28 2021

Michael Klein (Renderbricks) updated the task description for T85142: 2.92 Beta/2.93 Alpha: BMW scene quits Blender.
Jan 28 2021, 8:15 AM · Dependency Graph, BF Blender
Michael Klein (Renderbricks) renamed T85142: 2.92 Beta/2.93 Alpha: BMW scene quits Blender from 2.93 Alpha: BMW scene quits Blender to 2.92 Beta/2.93 Alpha: BMW scene quits Blender.
Jan 28 2021, 8:13 AM · Dependency Graph, BF Blender
Michael Klein (Renderbricks) created T85142: 2.92 Beta/2.93 Alpha: BMW scene quits Blender.
Jan 28 2021, 8:11 AM · Dependency Graph, BF Blender

Jan 21 2021

Michael Klein (Renderbricks) added a comment to T37814: Artifacts in Cycles render for lowpoly models..

I think blender's implementation of appleseed's fix is nice, but it's still unusuable due to the additional artefacts it causes around the edges of objects.

I'd love to know how Corona Renderer fixed it back in 2017, the result is flawless and it requires no user interaction:

https://coronarenderer.freshdesk.com/support/solutions/articles/5000516258

Jan 21 2021, 12:14 PM · BF Blender
Michael Klein (Renderbricks) added a comment to T37814: Artifacts in Cycles render for lowpoly models..

@CHET (cheteron)
Evee uses shadow maps, while Arnold and Cycles are raytracers, then they can't be compared. The shadow issues in Eevee are due to shadow mapping inaccuracies, unlike raytraced shadows which are technically perfect. The shadow issues in the Arnold and Redshift renders are due to the terminator issue.

Jan 21 2021, 12:14 PM · BF Blender
Michael Klein (Renderbricks) added a comment to T37814: Artifacts in Cycles render for lowpoly models..

@CHET (cheteron) @Alma Talp (AlmaTalp) @lucas veber (lucky3) Vray is using a similar workaround called "Shadow Bias". I am pretty sure that the programmers of Mental Ray found no better solution.

Jan 21 2021, 11:24 AM · BF Blender
Michael Klein (Renderbricks) added a comment to T37814: Artifacts in Cycles render for lowpoly models..

@CHET (cheteron) @Alma Talp (AlmaTalp)

Jan 21 2021, 11:17 AM · BF Blender
Michael Klein (Renderbricks) added a comment to T37814: Artifacts in Cycles render for lowpoly models..

@CHET (cheteron) @Alma Talp (AlmaTalp) THIS is the same issue. Just inverted. It won't happen when you see it on the sphere like in the Blender example. ARNOLD, RS, and all other renderers claiming to have it fixed are just using another workaround because the Terminator Effect is more extreme on convex surfaces.

Jan 21 2021, 11:11 AM · BF Blender
Michael Klein (Renderbricks) added a comment to T37814: Artifacts in Cycles render for lowpoly models..

Mental Ray solved it like 10 years ago. I tested the Blender 'solution1 in 2.91 it resulted black rim around the sphere. No win yet.

Jan 21 2021, 11:09 AM · BF Blender
Michael Klein (Renderbricks) added a comment to T37814: Artifacts in Cycles render for lowpoly models..

This shows that other engines do better than cycles.

Jan 21 2021, 11:02 AM · BF Blender
Michael Klein (Renderbricks) added a comment to T37814: Artifacts in Cycles render for lowpoly models..

@CHET (cheteron) Just to make clear that the other renderers haven't solved the issue. It's just inverted. :-)

Jan 21 2021, 10:57 AM · BF Blender
Michael Klein (Renderbricks) added a comment to T37814: Artifacts in Cycles render for lowpoly models..

The only solution is to use higher subdivided meshes to

Higher subdivided mesh - it's not solution! If you need to make a low poly mesh and make a nice render? Then this method is not suitable!
Don't offer stupid methods in 2021 instead of solving the problem

Jan 21 2021, 10:00 AM · BF Blender
Michael Klein (Renderbricks) added a comment to T37814: Artifacts in Cycles render for lowpoly models..

I have this problem, I ask you to fix it urgently, it interferes with the work.

Jan 21 2021, 9:40 AM · BF Blender

Jan 20 2021

Michael Klein (Renderbricks) updated subscribers of T84872: Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using hidden CPU Branched Path Tracing samples and not the Path Tracing samples.

@Brecht Van Lommel (brecht) This was fast. Good job!

Jan 20 2021, 10:45 PM · Render & Cycles, BF Blender

Jan 19 2021

Michael Klein (Renderbricks) updated the task description for T84872: Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using hidden CPU Branched Path Tracing samples and not the Path Tracing samples.
Jan 19 2021, 11:37 PM · Render & Cycles, BF Blender
Michael Klein (Renderbricks) updated the task description for T84872: Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using hidden CPU Branched Path Tracing samples and not the Path Tracing samples.
Jan 19 2021, 11:34 PM · Render & Cycles, BF Blender
Michael Klein (Renderbricks) renamed T84872: Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using hidden CPU Branched Path Tracing samples and not the Path Tracing samples from Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using hidden CPU Branched Path Tracing sample rate and not the Path Tracing samples to Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using hidden CPU Branched Path Tracing samples and not the Path Tracing samples.
Jan 19 2021, 11:32 PM · Render & Cycles, BF Blender
Michael Klein (Renderbricks) renamed T84872: Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using hidden CPU Branched Path Tracing samples and not the Path Tracing samples from Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using CPU Branched Path Tracing sample rate and not the Path Tracing samples to Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using hidden CPU Branched Path Tracing sample rate and not the Path Tracing samples.
Jan 19 2021, 11:31 PM · Render & Cycles, BF Blender
Michael Klein (Renderbricks) updated the task description for T84872: Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using hidden CPU Branched Path Tracing samples and not the Path Tracing samples.
Jan 19 2021, 11:31 PM · Render & Cycles, BF Blender
Michael Klein (Renderbricks) updated the task description for T84872: Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using hidden CPU Branched Path Tracing samples and not the Path Tracing samples.
Jan 19 2021, 11:29 PM · Render & Cycles, BF Blender
Michael Klein (Renderbricks) renamed T84872: Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using hidden CPU Branched Path Tracing samples and not the Path Tracing samples from Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using CPU sample rate when set to Branched Path Tracing to Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using CPU Branched Path Tracing sample rate and not the Path Tracing samples.
Jan 19 2021, 11:28 PM · Render & Cycles, BF Blender
Michael Klein (Renderbricks) renamed T84872: Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using hidden CPU Branched Path Tracing samples and not the Path Tracing samples from Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU is using CPU sample rate when set to Branched Path Tracing to Blender 2.92/2.93 Adaptive Sampling: Hybrid GPU+CPU (OptiX/RTX) is using CPU sample rate when set to Branched Path Tracing.
Jan 19 2021, 11:24 PM · Render & Cycles, BF Blender