Object disappear (eventually crash) while changing multires subdivision level #47637

New Issue

Tomas Dostal · 2016-03-01T09:46:48+01:00

Tomas Dostal commented

2016-03-01 09:46:48 +01:00

System Information
WIN10
32GB RAM
NVIDIA GFORCE GTX980

Blender Version
Broken: (example: 2.76b f337fea, 2.77 RC too)

Short description of error

Object (mesh) disappear, eventually Blender crashes, while switching multires subdivision level (PgDn PgUp). All objects in sculpt mode. All objects have multires modifier. Sometimes when you switch among objects by right click on them Blender crashes.

Exact steps for others to reproduce the error

In attached BLEND file use PgUp and PgDn to change multires subdivision level.
If it is ok, then ensure all objects are in sculpt mode and switch between them and repeat step 1

sculpt.blend

**System Information** WIN10 32GB RAM NVIDIA GFORCE GTX980 **Blender Version** Broken: (example: 2.76b f337fea, 2.77 RC too) **Short description of error** Object (mesh) disappear, eventually Blender crashes, while switching multires subdivision level (PgDn PgUp). All objects in sculpt mode. All objects have multires modifier. Sometimes when you switch among objects by right click on them Blender crashes. **Exact steps for others to reproduce the error** - In attached BLEND file use PgUp and PgDn to change multires subdivision level. - If it is ok, then ensure all objects are in sculpt mode and switch between them and repeat step 1 [sculpt.blend](https://archive.blender.org/developer/F286492/sculpt.blend)

Tomas Dostal commented

2016-03-01 09:46:48 +01:00

Changed status to: 'Open'

Tomas Dostal commented

2016-03-01 09:46:48 +01:00

Added subscriber: @TomasDostal

Sergey Sharybin commented

2016-03-01 13:04:13 +01:00

Added subscriber: @Sergey

Sergey Sharybin commented

2016-03-01 13:04:13 +01:00

Can reproduce the issue, not sure what's causing it. Maybe running out of GPU resources.. Needs more investigation.

Alex commented

2016-03-03 12:06:45 +01:00

Added subscriber: @SpectreFirst

Alex commented

2016-03-03 12:37:28 +01:00

Just in case: I have encountered the same bug as well both in 2.76 and 2.77 and in most simple case it looks like this:

Create an empty scene and add two planes
Add multires to both planes. Set multires of the first plane to 1 and multires of the second plane to 2 ( now we have two objects with different multires levels)
Switch first plane to Sculpt mode
Select second plane through Outliner window and switch to Sculpt mode as well (now we have two objects with Sculpt mode activated and different levels of multires)
Try selecting the first plane through Outliner and Blender will crash

I have tried the same steps with two cubes and when I'm selecting one of the cubes it gets corrupted; after selecting back and fourth between two cubes through Outliner window Blender crashed.
If you add multires to both objects but leave one multires on 0, crash doesn't seem to happen, but when you add a level and if this level is different from the level of another object, switching level in Preview field causes a crash.

Hope this will help.

Just in case: I have encountered the same bug as well both in 2.76 and 2.77 and in most simple case it looks like this: 1. Create an empty scene and add two planes 2. Add multires to both planes. Set multires of the first plane to 1 and multires of the second plane to 2 ( now we have two objects with different multires levels) 3. Switch first plane to Sculpt mode 4. Select second plane through Outliner window and switch to Sculpt mode as well (now we have two objects with Sculpt mode activated and different levels of multires) 5. Try selecting the first plane through Outliner and Blender will crash I have tried the same steps with two cubes and when I'm selecting one of the cubes it gets corrupted; after selecting back and fourth between two cubes through Outliner window Blender crashed. If you add multires to both objects but leave one multires on 0, crash doesn't seem to happen, but when you add a level and if this level is different from the level of another object, switching level in Preview field causes a crash. Hope this will help.

Tomas Dostal commented

2016-03-03 23:06:00 +01:00

Alex: I can confirm this. In my case I simply select other objects by RMB.

Bastien Montagne commented

2016-06-02 15:58:58 +02:00

Added subscriber: @mont29

Bastien Montagne self-assigned this 2016-06-02 15:58:58 +02:00

Bastien Montagne commented

2016-06-02 15:58:58 +02:00

Found the culprit (static global gpu buffer used for 'grid' pbvh - was a nice hunt…), fix incoming.

blender-admin commented

2016-06-02 16:14:21 +02:00

This issue was referenced by 68d1348ca2

This issue was referenced by 68d1348ca2f4ae7fcd6eff5b7bdbd84d75988ae8

Bastien Montagne commented

2016-06-02 16:14:54 +02:00

Changed status from 'Open' to: 'Resolved'

Bastien Montagne closed this issue

2016-06-02 16:14:54 +02:00

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Reference: blender/blender#47637

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Object disappear (eventually crash) while changing multires subdivision level #47637