Add/Mix Shaders Cause Artifacting in EEVEE Next #125514

New Issue

Tyler-120 · 2024-07-26T21:23:08+02:00

Tyler-120 commented

2024-07-26 21:23:08 +02:00

System Information
Operating system: Windows 11
Graphics card: NVIDIA GeForce RTX 3090

Blender Version
Broken: 4.2.0, branch: blender-v4.2-release, commit date: 2024-07-16 06:20, hash: a51f293548, type: Release
Worked: 4.1.1, branch: blender-v4.1-release, commit date: 2024-04-15 15:11, hash: e1743a0317, type: Release

Short description of error
When using an Add Shader or Mix Shader node in materials I get a lot of artifacting and noise in the Material Preview and Rendered views as well as in the final render.

Exact steps for others to reproduce the error

Make a new material.
Add two shaders. (I'm using two diffuse shaders, but the behavior also shows up with Principled BSDF) together with either a Mix Shader or Add Shader node.
Switch to Material Preview or Rendered mode

The attached images are the render outputs.

**System Information** Operating system: Windows 11 Graphics card: NVIDIA GeForce RTX 3090 **Blender Version** Broken: 4.2.0, branch: blender-v4.2-release, commit date: 2024-07-16 06:20, hash: a51f293548ad, type: Release Worked: 4.1.1, branch: blender-v4.1-release, commit date: 2024-04-15 15:11, hash: e1743a0317bc, type: Release **Short description of error** When using an Add Shader or Mix Shader node in materials I get a lot of artifacting and noise in the Material Preview and Rendered views as well as in the final render. **Exact steps for others to reproduce the error** 1. Make a new material. 2. Add two shaders. (I'm using two diffuse shaders, but the behavior also shows up with Principled BSDF) together with either a Mix Shader or Add Shader node. 3. Switch to Material Preview or Rendered mode The attached images are the render outputs.

add-shader-artifacting.blend

995 KiB

add-shader-nodes.png

35 KiB

diffuse-shader.png

1.3 MiB

add-shader.png

1.6 MiB

diffuse-shader-nodes.png

32 KiB

diffuse-shader-viewport-normal.mp4

677 KiB

add-shader-viewport-tearing.mp4

1.4 MiB

Tyler-120 added the

labels 2024-07-26 21:23:09 +02:00

Alaska commented

2024-07-27 04:31:11 +02:00

The noise from the mixing/adding of shaders is expected as the shaders are sampling stocastically in 4.2. However the appearance of the noise has been improved in 4.3 and will likely be improved in an upcoming 4.2.X release.

Can you confirm that the issue is improved in 4.3 https://builder.blender.org/download/daily/

You've also attached a video of the issue and the artifacts that occur as you change orthographic views. This is a side effect of the temporal reprojection system and how it handles the noise. The artifacts have reduced as a side effect of the reduction of noise in 4.3.

The noise from the mixing/adding of shaders is expected as the shaders are sampling stocastically in 4.2. However the appearance of the noise has been improved in 4.3 and will likely be improved in an upcoming 4.2.X release. Can you confirm that the issue is improved in 4.3 https://builder.blender.org/download/daily/ --- You've also attached a video of the issue and the artifacts that occur as you change orthographic views. This is a side effect of the temporal reprojection system and how it handles the noise. The artifacts have reduced as a side effect of the reduction of noise in 4.3.

Alaska added

Status

Needs Information from User

and removed

Status

Needs Triage

labels 2024-07-27 04:31:19 +02:00

Tyler-120 commented

2024-07-27 09:55:39 +02:00

@Alaska - just checked in 4.3 and you're correct. It all looks good, though I do get a bit of a hang when switching to EEVEE/Material Preview, and when I initially add the shaders together.

Thanks for the info here - looking forward to the potential 4.2.X release.

@Alaska - just checked in 4.3 and you're correct. It all looks good, though I do get a bit of a hang when switching to EEVEE/Material Preview, and when I initially add the shaders together. Thanks for the info here - looking forward to the potential 4.2.X release.

Tyler-120 closed this issue

2024-07-27 09:55:43 +02:00

Blender Bot added

Status

Archived

and removed

Status

Needs Information from User

labels 2024-07-27 09:55:45 +02:00

Alaska commented

2024-07-27 15:09:02 +02:00

Thanks for the update.

I'll just add some extra notes:

I do get a bit of a hang when switching to EEVEE/Material Preview, and when I initially add the shaders together.

This is expected as you have to recompile these shaders as you're using them for the first time again.

looking forward to the potential 4.2.X release.

4.2.1 is unlikely to have the fix as different issue needs to be fixed before this fix can make it into a 4.2.X release.

Thanks for the update. I'll just add some extra notes: > I do get a bit of a hang when switching to EEVEE/Material Preview, and when I initially add the shaders together. This is expected as you have to recompile these shaders as you're using them for the first time again. > looking forward to the potential 4.2.X release. 4.2.1 is unlikely to have the fix as different issue needs to be fixed before this fix can make it into a 4.2.X release.

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Add/Mix Shaders Cause Artifacting in EEVEE Next #125514