Nodes connected to Subsurface Radius input not working properly on Eevee #90263

New Issue

Joseph Eagar · 2021-07-28T15:43:22+02:00

Joseph Eagar commented

2021-07-28 15:43:22 +02:00

System Information
Operating system: Windows 10
Graphics card: NVidia

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-07-28 18:16, hash: 8aa1c0a326
Worked: Never

Short description of error
When connecting the Combine XYZ node
(for example) to the Subsurface Radius input of Principle BSDF, the resulting effect is not as expected.
The XYZ values affect the result somewhat, but not in the same way as seen in Cycles or without connecting the node.

Exact steps for others to reproduce the error

Open attached .blend file
Set the render preview

Disconnect `Combine XYZ` from the `Principle BSDF` to see the difference

SSS_simplified.blend

**System Information** Operating system: Windows 10 Graphics card: NVidia **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-07-28 18:16, hash: 8aa1c0a326 Worked: Never **Short description of error** When connecting the `Combine XYZ` node (for example) to the `Subsurface Radius` input of `Principle BSDF`, the resulting effect is not as expected. The XYZ values affect the result somewhat, but not in the same way as seen in Cycles or without connecting the node. **Exact steps for others to reproduce the error** - Open attached .blend file - Set the render preview # Disconnect `Combine XYZ` from the `Principle BSDF` to see the difference [SSS_simplified.blend](https://archive.blender.org/developer/F10247897/SSS_simplified.blend)

Joseph Eagar commented

2021-07-28 15:43:22 +02:00

Added subscriber: @JosephEagar

Pratik Borhade commented

2021-07-28 17:21:33 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2021-07-28 17:21:33 +02:00

Hi @JosephEagar , not checked the file yet but could be a known limitation.

Reported problem looks similar to #60443 which was closed as known limitation.

(refer: https://docs.blender.org/manual/en/dev/render/eevee/materials/nodes_support.html)

Hi @JosephEagar , not checked the file yet but could be a known limitation. Reported problem looks similar to #60443 which was closed as known limitation. (refer: https://docs.blender.org/manual/en/dev/render/eevee/materials/nodes_support.html)

Joseph Eagar commented

2021-07-28 19:31:36 +02:00

That's something different. This isn't a problem with linked socket inputs working differently between Eevee and Cycles.

Germano Cavalcante commented

2021-07-29 17:44:35 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2021-07-29 17:44:35 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Germano Cavalcante commented

2021-07-29 17:44:35 +02:00

Thanks for the report. Unfortunately the scenario described is too time consuming for us to track down, we require the bug reporter to narrow down the problem.

Normally .blend files can be simplified by removing most objects and disabling settings, until the problem reveals itself more clearly.

Thanks for the report. Unfortunately the scenario described is too time consuming for us to track down, we require the bug reporter to narrow down the problem. Normally .blend files can be simplified by removing most objects and disabling settings, until the problem reveals itself more clearly.

Joseph Eagar commented

2021-07-30 20:03:18 +02:00

:P

Germano Cavalcante commented

2021-07-30 20:16:22 +02:00

Here is an example of a simplified file:
SSS_simplified.blend

Since we only need to investigate the SSS, no other objects (such as hair, eyes, clothes) are needed.
We also don't need math nodes, texture nodes, etc.

Simplifying the file I could see that the problem is not a "mismatch between Cycles and EEVEE".
Apparently nodes connected to Subsurface Radius do not work on Eevee.

If I'm not mistaken, we already have a report about this problem (I need to search).
Anyway, this report cannot be accepted as it is.

Here is an example of a simplified file: [SSS_simplified.blend](https://archive.blender.org/developer/F10247897/SSS_simplified.blend) Since we only need to investigate the SSS, no other objects (such as hair, eyes, clothes) are needed. We also don't need math nodes, texture nodes, etc. Simplifying the file I could see that the problem is not a "mismatch between Cycles and EEVEE". Apparently nodes connected to `Subsurface Radius` do not work on Eevee. If I'm not mistaken, we already have a report about this problem (I need to search). Anyway, this report cannot be accepted as it is.

Joseph Eagar commented

2021-07-31 07:30:06 +02:00

This comment was removed by @JosephEagar

*This comment was removed by @JosephEagar*

Germano Cavalcante changed title from ~~SSS Radius Mismatch Between Cycles and EEVEE~~ to Nodes connected to Subsurface Radius input not working properly on Eevee

2021-08-02 23:57:37 +02:00

Germano Cavalcante commented

2021-08-02 23:57:37 +02:00

Changed status from 'Needs User Info' to: 'Confirmed'

Germano Cavalcante commented

2021-08-03 00:00:20 +02:00

I have not found the other report about this issue.
(Has this really been reported before?)
Anyway, I edited the description so we can confirm the bug.

I have not found the other report about this issue. (Has this really been reported before?) Anyway, I edited the description so we can confirm the bug.

Germano Cavalcante commented

2021-08-03 00:03:19 +02:00

Oh, it's the same problem of #60443 as mentioned by @PratikPB2123.
So it's a known limitation.

Oh, it's the same problem of #60443 as mentioned by @PratikPB2123. So it's a known limitation.

Germano Cavalcante commented

2021-08-03 00:03:32 +02:00

Closed as duplicate of #60443

Germano Cavalcante closed this issue

2021-08-03 00:03:32 +02:00

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Nodes connected to Subsurface Radius input not working properly on Eevee #90263

Disconnect Combine XYZ from the Principle BSDF to see the difference

Disconnect `Combine XYZ` from the `Principle BSDF` to see the difference