Tangent shader node & subdivision surface crashes blender #96224

New Issue

Antoine · 2022-03-07T18:11:31+01:00

Antoine commented

2022-03-07 18:11:31 +01:00

System Information
Operating system: windows 11
Graphics Card: NVIDIA GeForce RTX 2060 SUPER
Processor: 12th Gen Intel(R) Core(TM) i5-12600K, 3686 Mhz, 10 Core(s), 16 Logical Processor(s)

Blender Version
Crash to desktop: 3.1.0 Candidate (7th and 3rd of march builds)
Bugged display but no crash: 3.1.0 Beta (27th feb build and older)
Worked: Blender 3.0.0

Short description of error
Using a shader with the Tangent node set to UV map mode, together with a subdiv surface modifier and setting the object to shade smooth immediatly crashes blender.

Exact steps for others to reproduce the error

set viewport to shaded
on default cube assign a shader that uses the Tangent node
set the Tangent node to UV map mode and pick the default UV
set the cube to shade smooth
add a subdivision modifier to the cube

**System Information** Operating system: windows 11 Graphics Card: NVIDIA GeForce RTX 2060 SUPER Processor: 12th Gen Intel(R) Core(TM) i5-12600K, 3686 Mhz, 10 Core(s), 16 Logical Processor(s) **Blender Version** Crash to desktop: 3.1.0 Candidate (7th and 3rd of march builds) Bugged display but no crash: 3.1.0 Beta (27th feb build and older) Worked: Blender 3.0.0 **Short description of error** Using a shader with the Tangent node set to UV map mode, together with a subdiv surface modifier and setting the object to shade smooth immediatly crashes blender. **Exact steps for others to reproduce the error** 1. set viewport to shaded 2. on default cube assign a shader that uses the Tangent node 3. set the Tangent node to UV map mode and pick the default UV 4. set the cube to shade smooth 5. add a subdivision modifier to the cube ![capture.png](https://archive.blender.org/developer/F12901073/capture.png)

Antoine commented

2022-03-07 18:11:31 +01:00

Added subscriber: @AntoineP

Ethan-Hall commented

2022-03-07 20:07:01 +01:00

Added subscriber: @Ethan-Hall

Ethan-Hall commented

2022-03-07 20:07:01 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Ethan-Hall commented

2022-03-07 20:07:01 +01:00

Can confirm. Occurs only with Viewport GPU Subdivision enabled.
GPU_Subdiv_Crash_Tangent_Node.crash.txt

Can confirm. Occurs only with Viewport GPU Subdivision enabled. [GPU_Subdiv_Crash_Tangent_Node.crash.txt](https://archive.blender.org/developer/F12901440/GPU_Subdiv_Crash_Tangent_Node.crash.txt)

Ethan-Hall commented

2022-03-07 20:10:55 +01:00

Test file:
GPU_Subdiv_Crash_Tangent_Node.blend

Make sure Viewport GPU Subdivision is enabled.
Enable the Subdivision modifier in the viewport.

Test file: [GPU_Subdiv_Crash_Tangent_Node.blend](https://archive.blender.org/developer/F12901447/GPU_Subdiv_Crash_Tangent_Node.blend) 1. Make sure Viewport GPU Subdivision is enabled. 2. Enable the Subdivision modifier in the viewport.

Thomas Dinges commented

2022-03-07 20:15:28 +01:00

Added subscribers: @kevindietrich, @ThomasDinges