OpenSubdiv incorrect shading and difficult selection #45759

New Issue

Marco G · 2015-08-11T19:35:06+02:00

Marco G commented

2015-08-11 19:35:06 +02:00

System Information
Win7 64bit - Nvidia 570
system-info.txt

Blender Version
Broken: hash b'c150645'
Worked: never AFAIK

Short description of error
Mesh with OpenSubdiv enabled has incorrect smooth shading. Also it is difficult to select, both with Occlusion queries or not.

Exact steps for others to reproduce the error
Open blend file, sphere on the right has OSD enabled:

has incorrect shading
it is nearly impossible to select within the red circle.
The sphere on the left without OSD is fine.

Example image:
Blend file: OSD-crease-selection_bug.blend

**System Information** Win7 64bit - Nvidia 570 [system-info.txt](https://archive.blender.org/developer/F223521/system-info.txt) **Blender Version** Broken: hash b'c150645' Worked: never AFAIK **Short description of error** Mesh with OpenSubdiv enabled has incorrect smooth shading. Also it is difficult to select, both with Occlusion queries or not. **Exact steps for others to reproduce the error** Open blend file, sphere on the right has OSD enabled: - has incorrect shading - it is nearly impossible to select within the red circle. The sphere on the left without OSD is fine. Example image: ![OSD-crease-selection_bug.jpg](https://archive.blender.org/developer/F223525/OSD-crease-selection_bug.jpg) Blend file: [OSD-crease-selection_bug.blend](https://archive.blender.org/developer/F223522/OSD-crease-selection_bug.blend)

Marco G commented

2015-08-11 19:35:06 +02:00

Changed status to: 'Open'

Marco G commented

2015-08-11 19:35:06 +02:00

Added subscriber: @marcog

Bastien Montagne commented

2015-08-11 19:50:37 +02:00

Added subscribers: @Sergey, @mont29

Bastien Montagne commented

2015-08-11 19:50:37 +02:00

@marcog this (crease) is not about shading, but real geometry.

@Sergey iirc OSD does not yet support crease?

@marcog re selection, please:

Ensure both your OS and drivers are fully up-to-date (nvidia 347 is not the latest).
Try to start Blender in factory settings (--factory-startup commandline option) (this will ensure whether this is a userpref or addon issue or not).
Try to tweak OGL settings in UserPreferences, System tab.
Try to tweak your GPU driver settings (e.g. try different values between 'performance' and 'quality' if you have such slider, etc.).
Try to place this dll next to your blender.exe (software OGL, will be slow, but will show whether this is a driver issue or not).

@marcog this (crease) is not about shading, but real geometry. @Sergey iirc OSD does not yet support crease? @marcog re selection, please: * Ensure both your OS and drivers are fully up-to-date (nvidia 347 is not the latest). * Try to start Blender in factory settings (`--factory-startup` commandline option) (this will ensure whether this is a userpref or addon issue or not). * Try to tweak OGL settings in UserPreferences, System tab. * Try to tweak your GPU driver settings (e.g. try different values between 'performance' and 'quality' if you have such slider, etc.). * Try to place [this dll](http://download.blender.org/ftp/sergey/softwaregl/win64/opengl32.dll) next to your blender.exe (software OGL, will be slow, but will show whether this is a driver issue or not).

Marco G commented

2015-08-11 20:11:39 +02:00

May I ask if you tested the blend? If yes, aren't you getting anything like the report?

BTW, if I place the dll you linked, i have no more Compute devices to select for OSD, so it invalidate the test.

May I ask if you tested the blend? If yes, aren't you getting anything like the report? BTW, if I place the dll you linked, i have no more Compute devices to select for OSD, so it invalidate the test.

Bastien Montagne commented

2015-08-11 20:16:02 +02:00

Yes, tested… Everything is working OK here, even the crease in fact (so was wrong on this point). But am on Linux (debian testing), quite different from windows.

And yes, sorry, forgot our software OGL cannot support OSD needs. :/ So please first of all update your nvidia driver.

Yes, tested… Everything is working OK here, even the crease in fact (so was wrong on this point). But am on Linux (debian testing), quite different from windows. And yes, sorry, forgot our software OGL cannot support OSD needs. :/ So please first of all update your nvidia driver.

Ivan commented

2015-08-12 01:52:29 +02:00

Added subscriber: @1vanK