Subsurface Weight socket always active if connected (Eevee) #114220

New Issue

Andrea Donati · 2023-10-28T10:46:34+02:00

Andrea Donati commented

2023-10-28 10:46:34 +02:00

System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 4090/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 528.49

Blender Version
Broken: version: 4.0.0 Beta, branch: blender-v4.0-release, commit date: 2023-10-27 13:13, hash: b0a032e2eb0a
Worked: (newest version of Blender that worked as expected)

Short description of error
In Eevee when you link a Principled BSDF node to the Subsurface Weight socket and you are in Eevee, even though the value is set to 0.0, the Subsurface appears to be set to 1.0

Exact steps for others to reproduce the error

Connect Value Node to Subsurface Weight of the Principled BSDF and Switch to Eevee Engine

**System Information** Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 4090/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 528.49 **Blender Version** Broken: version: 4.0.0 Beta, branch: blender-v4.0-release, commit date: 2023-10-27 13:13, hash: `b0a032e2eb0a` Worked: (newest version of Blender that worked as expected) **Short description of error** In Eevee when you link a Principled BSDF node to the Subsurface Weight socket and you are in Eevee, even though the value is set to 0.0, the Subsurface appears to be set to 1.0 **Exact steps for others to reproduce the error** Connect Value Node to Subsurface Weight of the Principled BSDF and Switch to Eevee Engine ![image](/attachments/a1d126b7-7935-400c-8ef0-72a73d89ca00)

image.png

438 KiB

Andrea Donati added the

labels 2023-10-28 10:46:34 +02:00

Germano Cavalcante commented

2023-10-30 15:38:50 +01:00

Thanks for the report, but this is a limitation of Screen Space Effects that do not support adjustable value per pixel.

See:

Subsurface Scattering
Random Walk sampling is not supported. Per color channel Radius is specified by the default socket value. Any link plugged into this socket gets ignored. Texture Blur is not accurate for any value other than 0.0 and 1.0.

https://docs.blender.org/manual/en/latest/render/eevee/materials/nodes_support.html

Also see:
#105667: Subsurface Scattering node radius input not working in Eevee
#84657: Subsurface Scattering Node - Radius not using connected values (Eevee)

Not much can be done at the moment :\

Thanks for the report, but this is a limitation of Screen Space Effects that do not support adjustable value per pixel. See: > Subsurface Scattering > Random Walk sampling is not supported. Per color channel Radius is specified by the default socket value. **Any link plugged into this socket gets ignored**. Texture Blur is not accurate for any value other than 0.0 and 1.0. https://docs.blender.org/manual/en/latest/render/eevee/materials/nodes_support.html Also see: #105667: Subsurface Scattering node radius input not working in Eevee #84657: Subsurface Scattering Node - Radius not using connected values (Eevee) Not much can be done at the moment :\

Germano Cavalcante closed this issue

2023-10-30 15:38:52 +01:00

Blender Bot added

and removed

labels 2023-10-30 15:38:55 +01:00

Andrea Donati commented

2023-10-30 17:15:51 +01:00

Oh my god I'm sorry, I didn't see this note, but it's bad news, in previous versions this behavior didn't exist.

I understand that there are valid reasons, but it seems like a step backwards compared to before, is there an area where suggestions can be made?

Oh my god I'm sorry, I didn't see this note, but it's bad news, in previous versions this behavior didn't exist. I understand that there are valid reasons, but it seems like a step backwards compared to before, is there an area where suggestions can be made?

Germano Cavalcante commented

2023-10-30 17:41:57 +01:00

See https://wiki.blender.org/wiki/Communication/Contact

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Subsurface Weight socket always active if connected (Eevee) #114220