Entering Sculpt mode after using Multires Subdivide crashes Blender #75748

New Issue

Antti Tikka · 2020-04-15T15:16:21+02:00

Antti Tikka commented

2020-04-15 15:16:21 +02:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.19

Blender Version
Broken: version: 2.83 (sub 13), branch: master, commit date: 2020-04-15 07:36, hash: 530008df1d
Worked: Build from April 10th still worked

Short description of error
Entering Sculpt mode after using Multires Subdivide crashes Blender.

Exact steps for others to reproduce the error

Add Multires modifier to the default cube
Click Subdivide
Switch into Sculpt mode

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 442.19 **Blender Version** Broken: version: 2.83 (sub 13), branch: master, commit date: 2020-04-15 07:36, hash: `530008df1d` Worked: Build from April 10th still worked **Short description of error** Entering Sculpt mode after using Multires Subdivide crashes Blender. **Exact steps for others to reproduce the error** 1. Add Multires modifier to the default cube 2. Click Subdivide 3. Switch into Sculpt mode

Antti Tikka commented

2020-04-15 15:16:21 +02:00

Added subscriber: @Symstract

blender-admin commented

2020-04-15 15:16:21 +02:00

#75931 was marked as duplicate of this issue

blender-admin commented

2020-04-15 15:16:21 +02:00

#75923 was marked as duplicate of this issue

blender-admin commented

2020-04-15 15:16:21 +02:00

#75911 was marked as duplicate of this issue

blender-admin commented

2020-04-15 15:16:21 +02:00

#75887 was marked as duplicate of this issue

blender-admin commented

2020-04-15 15:16:21 +02:00

#75864 was marked as duplicate of this issue

blender-admin commented

2020-04-15 15:16:21 +02:00

#75858 was marked as duplicate of this issue

blender-admin commented

2020-04-15 15:16:21 +02:00

#75838 was marked as duplicate of this issue

blender-admin commented

2020-04-15 15:16:21 +02:00

#75817 was marked as duplicate of this issue

blender-admin commented

2020-04-15 15:16:21 +02:00

#75807 was marked as duplicate of this issue

blender-admin commented

2020-04-15 15:16:21 +02:00

#75776 was marked as duplicate of this issue

blender-admin commented

2020-04-15 15:16:21 +02:00

#75773 was marked as duplicate of this issue

blender-admin commented

2020-04-15 15:16:21 +02:00

#75771 was marked as duplicate of this issue

Ankit Meel commented

2020-04-15 17:56:03 +02:00

Added subscribers: @PabloDobarro, @ankitm

Ankit Meel commented

2020-04-15 17:56:03 +02:00

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

Ankit Meel commented

2020-04-15 17:56:03 +02:00

caused by bf49bb354f
CC @PabloDobarro

- 0 in SCULPT_visibility_sync_all_vertex_to_face_sets at blender/source/blender/editors/sculpt_paint/sculpt.c:487
- 1 in sculpt_init_session at blender/source/blender/editors/sculpt_paint/sculpt.c:7495
- 2 in ED_object_sculptmode_enter_ex at blender/source/blender/editors/sculpt_paint/sculpt.c:7540
- 3 in sculpt_mode_toggle_exec at blender/source/blender/editors/sculpt_paint/sculpt.c:7706
- 4 in wm_operator_invoke at blender/source/blender/windowmanager/intern/wm_event_system.c:1283
- 5 in wm_operator_call_internal at blender/source/blender/windowmanager/intern/wm_event_system.c:1485
- 6 in WM_operator_name_call_ptr at blender/source/blender/windowmanager/intern/wm_event_system.c:1533
- 7 in ED_object_mode_toggle at blender/source/blender/editors/object/object_modes.c:177
- 8 in object_mode_set_exec at blender/source/blender/editors/object/object_edit.c:1434
- 9 in wm_operator_invoke at blender/source/blender/windowmanager/intern/wm_event_system.c:1283
- 10 in wm_operator_call_internal at blender/source/blender/windowmanager/intern/wm_event_system.c:1519
- 11 in WM_operator_name_call_ptr at blender/source/blender/windowmanager/intern/wm_event_system.c:1533
- 12 in ED_object_mode_generic_enter at blender/source/blender/editors/object/object_modes.c:229
- 13 in ED_workspace_change at blender/source/blender/editors/screen/workspace_edit.c:178
- 14 in WM_window_set_active_workspace at blender/source/blender/windowmanager/intern/wm_window.c:2345
- 15 in wm_event_do_notifiers at blender/source/blender/windowmanager/intern/wm_event_system.c:431
- 16 in WM_main at blender/source/blender/windowmanager/intern/wm.c:453
- 17 in main at blender/source/creator/creator.c:524

caused by bf49bb354f CC @PabloDobarro ``` - 0 in SCULPT_visibility_sync_all_vertex_to_face_sets at blender/source/blender/editors/sculpt_paint/sculpt.c:487 - 1 in sculpt_init_session at blender/source/blender/editors/sculpt_paint/sculpt.c:7495 - 2 in ED_object_sculptmode_enter_ex at blender/source/blender/editors/sculpt_paint/sculpt.c:7540 - 3 in sculpt_mode_toggle_exec at blender/source/blender/editors/sculpt_paint/sculpt.c:7706 - 4 in wm_operator_invoke at blender/source/blender/windowmanager/intern/wm_event_system.c:1283 - 5 in wm_operator_call_internal at blender/source/blender/windowmanager/intern/wm_event_system.c:1485 - 6 in WM_operator_name_call_ptr at blender/source/blender/windowmanager/intern/wm_event_system.c:1533 - 7 in ED_object_mode_toggle at blender/source/blender/editors/object/object_modes.c:177 - 8 in object_mode_set_exec at blender/source/blender/editors/object/object_edit.c:1434 - 9 in wm_operator_invoke at blender/source/blender/windowmanager/intern/wm_event_system.c:1283 - 10 in wm_operator_call_internal at blender/source/blender/windowmanager/intern/wm_event_system.c:1519 - 11 in WM_operator_name_call_ptr at blender/source/blender/windowmanager/intern/wm_event_system.c:1533 - 12 in ED_object_mode_generic_enter at blender/source/blender/editors/object/object_modes.c:229 - 13 in ED_workspace_change at blender/source/blender/editors/screen/workspace_edit.c:178 - 14 in WM_window_set_active_workspace at blender/source/blender/windowmanager/intern/wm_window.c:2345 - 15 in wm_event_do_notifiers at blender/source/blender/windowmanager/intern/wm_event_system.c:431 - 16 in WM_main at blender/source/blender/windowmanager/intern/wm.c:453 - 17 in main at blender/source/creator/creator.c:524 ```

Steffen Dünner commented

2020-04-15 23:02:50 +02:00

Added subscriber: @SteffenD

Ankit Meel commented

2020-04-16 07:12:29 +02:00

Added subscribers: @MeshVoid, @SlateBlue

Enrique Barranco commented

2020-04-16 07:17:18 +02:00

Added subscriber: @ebarranco

Ankit Meel commented

2020-04-16 09:43:12 +02:00

Added subscriber: @wevon-2

Ponomarev Semyon commented

2020-04-16 13:44:58 +02:00

Added subscriber: @Yusz

Angelos Axiotis commented

2020-04-16 15:30:09 +02:00

Added subscriber: @angelo9888

TheRedWaxPolice commented

2020-04-16 20:06:36 +02:00

Added subscriber: @TheRedWaxPolice

TheRedWaxPolice commented

2020-04-16 20:06:36 +02:00

This crash is painful... A temporary workaround is to disable the multires before entering the sculpt mode.. then enable it.. 😐

This crash is painful... A temporary workaround is to disable the multires before entering the sculpt mode.. ![image.png](https://archive.blender.org/developer/F8477228/image.png) then enable it.. 😐

Pablo Dobarro commented

2020-04-17 03:24:09 +02:00

Added subscriber: @HoyaChoe

Ankit Meel commented

2020-04-17 08:25:40 +02:00

Added subscriber: @zubenelgennubi

fwfeet commented

2020-04-17 09:38:41 +02:00

Added subscriber: @costa

Damien Monteillard commented

2020-04-17 15:00:59 +02:00

Added subscriber: @lastrodamo

Damien Monteillard commented

2020-04-17 15:02:43 +02:00

I have the same crash with the latest release 2.83 beta

Yegor commented

2020-04-17 16:09:22 +02:00

Added subscriber: @YegorSmirnov

Brecht Van Lommel commented

2020-04-17 17:47:30 +02:00

Added subscriber: @koko_ze

Rodger Davis commented

2020-04-17 21:08:52 +02:00

Added subscriber: @RodDavis

Evan Wilson commented

2020-04-18 07:37:31 +02:00

Added subscriber: @jemian

Robert Guetzkow commented

2020-04-18 12:25:57 +02:00

Added subscriber: @Isfuelo

Robert Guetzkow commented

2020-04-18 14:21:51 +02:00

Added subscriber: @rjg

Robert Guetzkow commented

2020-04-18 14:21:51 +02:00

With the multires modifier enabled, there's no mesh data in the SculptSession. mvert, mpoly and mloop are NULL. Looks to me like sculpt_update_object (paint.c ) should set them to their actual values instead of NULL when the multires modifier is used.

  if (mmd) {
    ss->multires.active = true;
    ss->multires.modifier = mmd;
    ss->multires.level = mmd->sculptlvl;
    ss->totvert = me_eval->totvert;
    ss->totpoly = me_eval->totpoly;
    ss->totfaces = me->totpoly;
    ss->mvert = NULL;
    ss->mpoly = NULL;
    ss->mloop = NULL;
  }

With the multires modifier enabled, there's no mesh data in the `SculptSession`. `mvert`, `mpoly` and `mloop` are `NULL`. Looks to me like `sculpt_update_object` ([paint.c ](https://developer.blender.org/diffusion/B/browse/master/source/blender/blenkernel/intern/paint.c)) should set them to their actual values instead of `NULL` when the multires modifier is used. ``` if (mmd) { ss->multires.active = true; ss->multires.modifier = mmd; ss->multires.level = mmd->sculptlvl; ss->totvert = me_eval->totvert; ss->totpoly = me_eval->totpoly; ss->totfaces = me->totpoly; ss->mvert = NULL; ss->mpoly = NULL; ss->mloop = NULL; } ```

Robert Guetzkow commented

2020-04-18 14:43:27 +02:00

Just noticed, there appears to be a patch D7431 for this that hasn't been committed yet.

Just noticed, there appears to be a patch [D7431](https://archive.blender.org/developer/D7431) for this that hasn't been committed yet.

Ankit Meel commented

2020-04-19 08:25:11 +02:00

Added subscribers: @rthc, @Russ1642