Turning on smooth shading in Dyntopo causes display errors #70427

New Issue

Chuck Ocheret · 2019-10-01T21:29:19+02:00

Chuck Ocheret commented

2019-10-01 21:29:19 +02:00

System Information
Operating system: Darwin-18.7.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro 560X OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.11.20

Blender Version
Broken: version: 2.81 (sub 12), branch: master, commit date: 2019-10-01 17:54, hash: 6700027863
Worked: recent 2.81 build

Short description of error
When Dyntopo is being used and Dyntopo->Smooth Shading is checked, the mesh displays incorrectly.

Exact steps for others to reproduce the error

Open the attached .blend file.
DynTopoSmooth.blend
Make sure you are in sculpt mode and Dyntopo is turned on.
Observe a properly rendered mesh (such as it is). See image...
Either via the Dyntopo pulldown or in the properties panel turn on Smooth Shading (via the checkbox).
Observe that the mesh appears to have gaps all over the surface. Actually kind of a cool effect but I digress. See image...
Turn on X-ray display
Observe that it looks like many of the vertices that should be on the surface appear to be drawn at the origin. See image...

**System Information** Operating system: Darwin-18.7.0-x86_64-i386-64bit 64 Bits Graphics card: AMD Radeon Pro 560X OpenGL Engine ATI Technologies Inc. 4.1 ATI-2.11.20 **Blender Version** Broken: version: 2.81 (sub 12), branch: master, commit date: 2019-10-01 17:54, hash: `6700027863` Worked: recent 2.81 build **Short description of error** When Dyntopo is being used and Dyntopo->Smooth Shading is checked, the mesh displays incorrectly. **Exact steps for others to reproduce the error** - Open the attached .blend file. [DynTopoSmooth.blend](https://archive.blender.org/developer/F7783944/DynTopoSmooth.blend) - Make sure you are in sculpt mode and Dyntopo is turned on. - Observe a properly rendered mesh (such as it is). See image... ![Screen Shot 2019-10-01 at 3.25.40 PM.png](https://archive.blender.org/developer/F7783947/Screen_Shot_2019-10-01_at_3.25.40_PM.png) - Either via the Dyntopo pulldown or in the properties panel turn on Smooth Shading (via the checkbox). - Observe that the mesh appears to have gaps all over the surface. Actually kind of a cool effect but I digress. See image... ![Screen Shot 2019-10-01 at 3.25.58 PM.png](https://archive.blender.org/developer/F7783949/Screen_Shot_2019-10-01_at_3.25.58_PM.png) - Turn on X-ray display - Observe that it looks like many of the vertices that should be on the surface appear to be drawn at the origin. See image... ![Screen Shot 2019-10-01 at 3.26.12 PM.png](https://archive.blender.org/developer/F7783956/Screen_Shot_2019-10-01_at_3.26.12_PM.png)

Chuck Ocheret commented

2019-10-01 21:29:19 +02:00

Added subscriber: @ChuckOcheret