3.1.0 Beta: Broken Subdivsion from older blend files #95383

New Issue

Rincewind · 2022-02-01T09:09:05+01:00

Rincewind commented

2022-02-01 09:09:05 +01:00

System Information
Operating system: Windows-10-10.0.19042-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 472.47

Blender Version
Broken: version: 3.1.0 Beta, branch: master, commit date: 2022-01-31 23:00, hash: f420118335
Worked: (newest version of Blender that worked as expected)

Short description of error
When opening a subdiv from a version prior to Blender 3.1.0 which such a setting

it's rendered like this

instead of this

Exact steps for others to reproduce the error
Open the attached blend file (creaed in 3.0.1) and render it (F12).

created in 3.0.1.blend

**System Information** Operating system: Windows-10-10.0.19042-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 472.47 **Blender Version** Broken: version: 3.1.0 Beta, branch: master, commit date: 2022-01-31 23:00, hash: `f420118335` Worked: (newest version of Blender that worked as expected) **Short description of error** When opening a subdiv from a version prior to Blender 3.1.0 which such a setting ![subdivision settings.png](https://archive.blender.org/developer/F12838838/subdivision_settings.png) it's rendered like this ![3.1.0.png](https://archive.blender.org/developer/F12838841/3.1.0.png) instead of this ![3.0.1.png](https://archive.blender.org/developer/F12838843/3.0.1.png) **Exact steps for others to reproduce the error** Open the attached blend file (creaed in 3.0.1) and render it (F12). [created in 3.0.1.blend](https://archive.blender.org/developer/F12838845/created_in_3.0.1.blend)

Rincewind commented

2022-02-01 09:09:06 +01:00

Added subscriber: @Rincewind3D-1

Alaska commented

2022-02-01 09:25:57 +01:00

Added subscriber: @Alaska

Alaska commented

2022-02-01 09:25:57 +01:00

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

Alaska commented

2022-02-01 09:25:57 +01:00

This is most likely the same issue as this #94479 (GPU Subdivision surface modifier does not apply to Cycles renders )

Can you confirm?

This is most likely the same issue as this #94479 (GPU Subdivision surface modifier does not apply to Cycles renders ) Can you confirm?

Rincewind commented

2022-02-01 09:47:34 +01:00

@Alaska

Yes, it's related
I can confirm that disabling Sub-D GPU fixes this issue.

But, this issue occurs for me only in files created prior to 3.1.0.
When I create a new file in 3.1.0 it seems to work with GPU acceleration sub-d.

@Alaska Yes, it's related I can confirm that disabling Sub-D GPU fixes this issue. **But**, this issue occurs for me only in files created prior to 3.1.0. When I create a new file in 3.1.0 it seems to work with GPU acceleration sub-d.

Alaska commented

2022-02-01 23:19:34 +01:00

In #95383#1299042, @Rincewind3D-1 wrote:
But, this issue occurs for me only in files created prior to 3.1.0.
When I create a new file in 3.1.0 it seems to work with GPU acceleration sub-d.

That's odd. When you create your new file in Blender 3.1.0, are you sure you're using the right render settings? If the render engine is set to EEVEE or Workbench, then you won't experience this issue, but if you change it to Cycles you should.

> In #95383#1299042, @Rincewind3D-1 wrote: > **But**, this issue occurs for me only in files created prior to 3.1.0. > When I create a new file in 3.1.0 it seems to work with GPU acceleration sub-d. That's odd. When you create your new file in Blender 3.1.0, are you sure you're using the right render settings? If the render engine is set to EEVEE or Workbench, then you won't experience this issue, but if you change it to Cycles you should.

Rincewind commented

2022-02-01 23:38:22 +01:00

In #95383#1299586, @Alaska wrote:

That's odd. When you create your new file in Blender 3.1.0, are you sure you're using the right render settings? If the render engine is set to EEVEE or Workbench, then you won't experience this issue, but if you change it to Cycles you should.

Yes, your right. It was the render engine. This is just a duplicate of https://developer.blender.org/T94479

> In #95383#1299586, @Alaska wrote: > > That's odd. When you create your new file in Blender 3.1.0, are you sure you're using the right render settings? If the render engine is set to EEVEE or Workbench, then you won't experience this issue, but if you change it to Cycles you should. Yes, your right. It was the render engine. This is just a duplicate of https://developer.blender.org/T94479

Rincewind commented

2022-02-01 23:38:56 +01:00

How do we mark here a duplicate?

Jesse Yurkovich commented

2022-02-02 00:08:14 +01:00

Closed as duplicate of #94479

Jesse Yurkovich closed this issue

2022-02-02 00:08:14 +01:00

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3.1.0 Beta: Broken Subdivsion from older blend files #95383