Huge memory usage when trying to paint on UVs far ouside the 0-1 range #75284

New Issue

Matt Alan · 2020-04-01T17:43:35+02:00

Matt Alan commented

2020-04-01 17:43:35 +02:00

Blender Version
Broken: version: 2.82a (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: 375c7dc4ca
Worked: Never

Short description of error
Blender freezes when I attempt to use the paint options, after adding an image to Texture Paint. Memory will skyrocket from 150MB to 13GB and does not un-freeze.
Youtube tutorial I'm following trying to learn to paint textures, bug happens after adding the image at 2:35, and I attempt to paint the model: https://www.youtube.com/watch?v=lmbAs9jE1vI
I am very new to Blender, but pretty sure it shouldn't be doing that when attempting to use the Paint tools.

Exact steps for others to reproduce the error

Open attached file
Try to paint the mesh

texture_paint_huge_memory_usage.blend

**Blender Version** Broken: version: 2.82a (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: `375c7dc4ca` Worked: Never **Short description of error** Blender freezes when I attempt to use the paint options, after adding an image to Texture Paint. Memory will skyrocket from 150MB to 13GB and does not un-freeze. Youtube tutorial I'm following trying to learn to paint textures, bug happens after adding the image at 2:35, and I attempt to paint the model: https://www.youtube.com/watch?v=lmbAs9jE1vI I am very new to Blender, but pretty sure it shouldn't be doing that when attempting to use the Paint tools. ![BlenderCrashReport.png](https://archive.blender.org/developer/F8441684/BlenderCrashReport.png) **Exact steps for others to reproduce the error** - Open attached file - Try to paint the mesh [texture_paint_huge_memory_usage.blend](https://archive.blender.org/developer/F8445952/texture_paint_huge_memory_usage.blend)

Matt Alan commented

2020-04-01 17:43:35 +02:00

Added subscriber: @Mattalan

blender-admin commented

2020-04-01 17:43:35 +02:00

#89646 was marked as duplicate of this issue

blender-admin commented

2020-04-01 17:43:35 +02:00

#75452 was marked as duplicate of this issue

Ankit Meel commented

2020-04-01 18:25:05 +02:00

Added subscriber: @ankitm

Ankit Meel commented

2020-04-01 18:25:05 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Ankit Meel commented

2020-04-01 18:25:05 +02:00

Hi Matt!
That could be a memory leak, or a result of scene with superfluous details. Please add a simple blend file to help redo the bug, with steps after which the memory increases.

Hi Matt! That could be a memory leak, or a result of scene with superfluous details. Please add a simple blend file to help redo the bug, with steps after which the memory increases.

Matt Alan commented

2020-04-01 18:31:11 +02:00

Thank you Ankit! I've attached the blend file I'm using.

From the Texture Paint screen, after creating a new image, I select Mode - Single Image, attach my Image file, and then when I attempt to paint the image, it freezes, then the memory spike happens, please see the image I've attached, where I've circled the step I take before it crashes.

In the Youtube link in my first post, it happens after the 2:35 time mark, where the Youtuber is able to paint their model, mine will crash.

BugToReproduce.blend

Thank you Ankit! I've attached the blend file I'm using. From the Texture Paint screen, after creating a new image, I select Mode - Single Image, attach my Image file, and then when I attempt to paint the image, it freezes, then the memory spike happens, please see the image I've attached, where I've circled the step I take before it crashes. ![image.png](https://archive.blender.org/developer/F8441746/image.png) In the Youtube link in my first post, it happens after the 2:35 time mark, where the Youtuber is able to paint their model, mine will crash. [BugToReproduce.blend](https://archive.blender.org/developer/F8441744/BugToReproduce.blend)

Ankit Meel commented

2020-04-01 18:33:08 +02:00

Changed status from 'Needs User Info' to: 'Needs Triage'

Ankit Meel commented

2020-04-02 09:30:12 +02:00

I had to force quit, when it exceeded 4 GB quickly. Got this in trace:

- 0	 in do_projectpaint_thread at blender/source/blender/editors/sculpt_paint/paint_image_proj.c:5336
- 1	 in BLI_task_pool_work_and_wait at blender/source/blender/blenlib/intern/task.c:937
- 2	 in project_paint_op at blender/source/blender/editors/sculpt_paint/paint_image_proj.c:5665
- 3	 in paint_proj_stroke_ps at blender/source/blender/editors/sculpt_paint/paint_image_proj.c:5765
- 4	 in paint_proj_stroke at blender/source/blender/editors/sculpt_paint/paint_image_proj.c:5806
- 5	 in paint_stroke_done at blender/source/blender/editors/sculpt_paint/paint_image.c:632
- 6	 in stroke_done at blender/source/blender/editors/sculpt_paint/paint_stroke.c:994
- 7	 in paint_stroke_modal at blender/source/blender/editors/sculpt_paint/paint_stroke.c:1448
- 8	 in wm_handler_operator_call at blender/source/blender/windowmanager/intern/wm_event_system.c:2006
- 9	 in wm_handlers_do_intern at blender/source/blender/windowmanager/intern/wm_event_system.c:2787
- 10	 in wm_handlers_do at blender/source/blender/windowmanager/intern/wm_event_system.c:2835
- 11	 in wm_event_do_handlers at blender/source/blender/windowmanager/intern/wm_event_system.c:3230
- 12	 in WM_main at blender/source/blender/windowmanager/intern/wm.c:447
- 13	 in main at blender/source/creator/creator.c:524

I had to force quit, when it exceeded 4 GB quickly. Got this in trace: ``` - 0 in do_projectpaint_thread at blender/source/blender/editors/sculpt_paint/paint_image_proj.c:5336 - 1 in BLI_task_pool_work_and_wait at blender/source/blender/blenlib/intern/task.c:937 - 2 in project_paint_op at blender/source/blender/editors/sculpt_paint/paint_image_proj.c:5665 - 3 in paint_proj_stroke_ps at blender/source/blender/editors/sculpt_paint/paint_image_proj.c:5765 - 4 in paint_proj_stroke at blender/source/blender/editors/sculpt_paint/paint_image_proj.c:5806 - 5 in paint_stroke_done at blender/source/blender/editors/sculpt_paint/paint_image.c:632 - 6 in stroke_done at blender/source/blender/editors/sculpt_paint/paint_stroke.c:994 - 7 in paint_stroke_modal at blender/source/blender/editors/sculpt_paint/paint_stroke.c:1448 - 8 in wm_handler_operator_call at blender/source/blender/windowmanager/intern/wm_event_system.c:2006 - 9 in wm_handlers_do_intern at blender/source/blender/windowmanager/intern/wm_event_system.c:2787 - 10 in wm_handlers_do at blender/source/blender/windowmanager/intern/wm_event_system.c:2835 - 11 in wm_event_do_handlers at blender/source/blender/windowmanager/intern/wm_event_system.c:3230 - 12 in WM_main at blender/source/blender/windowmanager/intern/wm.c:447 - 13 in main at blender/source/creator/creator.c:524 ```

Germano Cavalcante changed title from ~~Freeze/Memory Spike using Paint~~ to Huge memory usage when trying to paint large portions of a texture on a mesh

2020-04-03 15:39:54 +02:00

Germano Cavalcante commented

2020-04-03 15:39:54 +02:00

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

Germano Cavalcante commented

2020-04-03 15:44:42 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-04-03 15:44:42 +02:00

The code works as designed. But it is a problem to have no safeguard or warning to avoid things like that.
The UV of your object is very high and any operation is working on the entire texture at once and several times.
Edit the UV of your object before working on the texture.

Although it's not really broken, I don't think such a problem should be ignored. At least it must be a task for #68896 (Texture painting usability)

The code works as designed. But it is a problem to have no safeguard or warning to avoid things like that. The UV of your object is very high and any operation is working on the entire texture at once and several times. Edit the UV of your object before working on the texture. Although it's not really broken, I don't think such a problem should be ignored. At least it must be a task for #68896 (Texture painting usability)

Philipp Oeser commented

2020-04-06 13:22:11 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-04-06 13:22:11 +02:00

@mano-wii: I think this should be a Known Issue then?
(feel free to change back though -- but usually out-of-memory issues are not considered bugs)

@mano-wii: I think this should be a Known Issue then? (feel free to change back though -- but usually out-of-memory issues are not considered bugs)

Kunal Das commented

2020-04-07 09:32:13 +02:00

Added subscriber: @Gigakb

Kunal Das commented

2020-04-07 09:32:13 +02:00

Most of the time, it skyrockets to 20GB+ for no reason at all. I guess its a huge memory leak.

Philipp Oeser commented

2020-04-07 11:22:13 +02:00

Just to make this clear: we are having UVs with values like 3000 [instead of 0-1 or at least something more sensible...]
Just quickly packing UVs here make will get rid of the memory spike:
BugToReproduce_packed.blend

I havent checked code here, and of course it would be good to reduce the cost even with huge UV maps, but still think there is no reason to have UVs with these astronomic values as well...

Just to make this clear: we are having UVs with values like 3000 [instead of 0-1 or at least something more sensible...] Just quickly packing UVs here make will get rid of the memory spike: [BugToReproduce_packed.blend](https://archive.blender.org/developer/F8454373/BugToReproduce_packed.blend) I havent checked code here, and of course it would be good to reduce the cost even with huge UV maps, but still think there is no reason to have UVs with these astronomic values as well...

Ankit Meel commented

2020-04-07 11:27:59 +02:00

Added subscribers: @rjg, @DirSurya

Philipp Oeser commented

2020-04-07 11:36:31 +02:00

@ankitm : not sure #75452 has the same roots... In #75452, the UVs all seem to ly inside a 0-1 range...

Ankit Meel commented

2020-04-07 11:37:14 +02:00

oh sorry, Please reopen

Philipp Oeser changed title from ~~Huge memory usage when trying to paint large portions of a texture on a mesh~~ to Huge memory usage when trying to paint on UVs far ouside the 0-1 range

2020-04-07 11:38:10 +02:00

Philipp Oeser commented

2021-07-20 12:53:33 +02:00

Added subscribers: @RangerOri, @PratikPB2123, @EAW

Philipp Oeser removed the

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Huge memory usage when trying to paint on UVs far ouside the 0-1 range #75284