Blender crashes if the subdivision resolution is increased #92913

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kursad k · 2021-11-08T01:37:55+01:00

kursad k commented

2021-11-08 01:37:55 +01:00

System Information
Operating system: Windows 10
Graphics card: RTX 2070

Blender Version
Broken: e7e3431b29

Short description of error
Increasing the subdivision resolution of the subd modifier in the scene crashes Blender.

# Blender 3.0.0, Commit date: 2021-11-04 19:51, Hash e7e3431b2994
bpy.ops.object.modifier_apply(modifier="Subdivision")  # Operator
Saved "19304_autosave.blend"  # Info
bpy.ops.mesh.primitive_monkey_add(size=2, enter_editmode=False, align='WORLD', location=(0, 0, 0), scale=(1, 1, 1))  # Operator
bpy.ops.transform.translate(value=(3.48821, -1.4378, 0.126482), orient_axis_ortho='X', orient_type='GLOBAL', orient_matrix=((1, 0, 0), (0, 1, 0), (0, 0, 1)), orient_matrix_type='GLOBAL', mirror=False, use_proportional_edit=False, proportional_edit_falloff='SMOOTH', proportional_size=1, use_proportional_connected=False, use_proportional_projected=False)  # Operator
bpy.ops.object.modifier_add(type='SUBSURF')  # Operator
bpy.ops.object.modifier_set_active(modifier="Subdivision")  # Operator
bpy.context.object.modifiers["Subdivision"].show_only_control_edges = False  # Property
Saved "19304_autosave.blend"  # Info
bpy.context.object.modifiers["Subdivision"].levels = 9  # Property

# backtrace
Exception Record:

ExceptionCode         : EXCEPTION_ACCESS_VIOLATION
Exception Address     : 0x00007FF7A9DCBE97
Exception Module      : blender.exe
Exception Flags       : 0x00000000
Exception Parameters  : 0x2
	Parameters[0] : 0x0000000000000001
	Parameters[1] : 0x0000000000000000

Stack trace:
blender.exe         :0x00007FF7A9DCBE97  Symbols not available

Loaded Modules :

# Python backtrace

19304_autosave.crash.txt

Exact steps for others to reproduce the error
Load the .blend file
Select Suzanne
Increase the viewport subdivision level to 9

19304_autosave.zip

**System Information** Operating system: Windows 10 Graphics card: RTX 2070 **Blender Version** Broken: e7e3431b2994 **Short description of error** Increasing the subdivision resolution of the subd modifier in the scene crashes Blender. ``` # Blender 3.0.0, Commit date: 2021-11-04 19:51, Hash e7e3431b2994 bpy.ops.object.modifier_apply(modifier="Subdivision") # Operator Saved "19304_autosave.blend" # Info bpy.ops.mesh.primitive_monkey_add(size=2, enter_editmode=False, align='WORLD', location=(0, 0, 0), scale=(1, 1, 1)) # Operator bpy.ops.transform.translate(value=(3.48821, -1.4378, 0.126482), orient_axis_ortho='X', orient_type='GLOBAL', orient_matrix=((1, 0, 0), (0, 1, 0), (0, 0, 1)), orient_matrix_type='GLOBAL', mirror=False, use_proportional_edit=False, proportional_edit_falloff='SMOOTH', proportional_size=1, use_proportional_connected=False, use_proportional_projected=False) # Operator bpy.ops.object.modifier_add(type='SUBSURF') # Operator bpy.ops.object.modifier_set_active(modifier="Subdivision") # Operator bpy.context.object.modifiers["Subdivision"].show_only_control_edges = False # Property Saved "19304_autosave.blend" # Info bpy.context.object.modifiers["Subdivision"].levels = 9 # Property # backtrace Exception Record: ExceptionCode : EXCEPTION_ACCESS_VIOLATION Exception Address : 0x00007FF7A9DCBE97 Exception Module : blender.exe Exception Flags : 0x00000000 Exception Parameters : 0x2 Parameters[0] : 0x0000000000000001 Parameters[1] : 0x0000000000000000 Stack trace: blender.exe :0x00007FF7A9DCBE97 Symbols not available Loaded Modules : # Python backtrace ``` [19304_autosave.crash.txt](https://archive.blender.org/developer/F11762621/19304_autosave.crash.txt) **Exact steps for others to reproduce the error** Load the .blend file Select Suzanne Increase the viewport subdivision level to 9 [19304_autosave.zip](https://archive.blender.org/developer/F11762630/19304_autosave.zip)

kursad k commented

2021-11-08 01:37:55 +01:00

Added subscriber: @kursadk

Roger B commented

2021-11-08 02:02:33 +01:00

Added subscriber: @rboxman

Roger B commented

2021-11-08 02:02:33 +01:00

You are most likely out of memory, a condition for which blender is not designed to recover from in many situations. A level 9 subdivided suzanne is 128million faces and requires just over 32gb of memory here. The UI already attempts to stop you from going so high by forcing you to type numbers larger than 6 into the property. The old 2.7 series of versions has the same issue and partial mitigation.

Also, please try not to upload such large files.

You are most likely out of memory, a condition for which blender is not designed to recover from in many situations. A level 9 subdivided suzanne is 128million faces and requires just over 32gb of memory here. The UI already attempts to stop you from going so high by forcing you to type numbers larger than 6 into the property. The old 2.7 series of versions has the same issue and partial mitigation. Also, please try not to upload such large files.

Germano Cavalcante commented

2021-11-10 16:38:26 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2021-11-10 16:38:26 +01:00

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

Germano Cavalcante closed this issue

2021-11-10 16:38:26 +01:00

Germano Cavalcante commented

2021-11-10 16:38:26 +01:00

Thanks for the report. It appears this crashes because Blender ran out of memory.

While we want to improve Blender to handle such cases memory gracefully, this is not currently considered a bug.

You can try to implement more RAM memory in your device.

Some modifiers deal with this by raising a warning instead of crashing. This could be implemented in the subdivision modifier in some near future as well.

Thanks for the report. It appears this crashes because Blender ran out of memory. While we want to improve Blender to handle such cases memory gracefully, this is not currently considered a bug. You can try to implement more RAM memory in your device. Some modifiers deal with this by raising a warning instead of crashing. This could be implemented in the subdivision modifier in some near future as well.

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Blender crashes if the subdivision resolution is increased #92913