Sculpt mode - hidden mesh parts unhide when sculpting if VBO enabled. #39950

New Issue

Gatis Kurzemnieks · 2014-04-29T11:50:34+02:00

Gatis Kurzemnieks commented

2014-04-29 11:50:34 +02:00

2.70.4

If VBO is enabled, then when in sculpt mode and you have hidden some mesh parts, they unhide as soon as you start sculpting (I used move brush).
When disabling VBO, everything works correctly.
Steps: Enable VBO in prefs, save, relaunch. Enter sculpt mode for object, hide some mesh part, try to sculpt with brush.

Another potential issue is when changing subdivision levels - everything becomes visible on other subd levels, but hidden parts are not editable. This is very very confusing.
Steps: hide some part of mesh, go to higher subd level - everything should be visible now, try sculpting previously hidden area!

2.70.4 If VBO is enabled, then when in sculpt mode and you have hidden some mesh parts, they unhide as soon as you start sculpting (I used move brush). When disabling VBO, everything works correctly. Steps: Enable VBO in prefs, save, relaunch. Enter sculpt mode for object, hide some mesh part, try to sculpt with brush. Another potential issue is when changing subdivision levels - everything becomes visible on other subd levels, but hidden parts are not editable. This is very very confusing. Steps: hide some part of mesh, go to higher subd level - everything should be visible now, try sculpting previously hidden area!

Gatis Kurzemnieks commented

2014-04-29 11:50:34 +02:00

Changed status to: 'Open'

Gatis Kurzemnieks commented

2014-04-29 11:50:34 +02:00

Added subscriber: @GatisKurzemnieks

Antonis Ryakiotakis was assigned by Sergey Sharybin

2014-04-29 16:07:51 +02:00

Sergey Sharybin commented

2014-04-29 16:07:51 +02:00

Added subscribers: @Psy-Fi, @Sergey

Sergey Sharybin commented

2014-04-29 16:07:51 +02:00

@Psy-Fi, mind having a look? Thanks!

Antonis Ryakiotakis commented

2014-04-29 16:17:50 +02:00

Something must be wrong because I cannot reproduce either of those issues here.

Sergey Sharybin commented

2014-04-29 16:23:16 +02:00

@Psy-Fi, ok..

@GatisKurzemnieks, which OS you're on BTW? Does it work with an official release?

@Psy-Fi, ok.. @GatisKurzemnieks, which OS you're on BTW? Does it work with an official release?

Gatis Kurzemnieks commented

2014-04-29 16:26:13 +02:00

huh, I my self cant reproduce first issue either. That is strange.
But the second issue still happens - as soon as I press page-up to add higher smoothing level, everything shows up, but previously hidden part is not editable

I'm on win8 64bit, build-bot build from yesterday.

huh, I my self cant reproduce first issue either. That is strange. But the second issue still happens - as soon as I press page-up to add higher smoothing level, everything shows up, but previously hidden part is not editable I'm on win8 64bit, build-bot build from yesterday.

Sergey Sharybin commented

2014-04-29 16:28:52 +02:00

Please test official release as well.

Gatis Kurzemnieks commented

2014-04-29 16:37:58 +02:00

I just tested on official 2.70a and the second issue is still there!! It seems like polygon visibility flags are stored only in specific subdivision level or something like that.

Could not reproduce first issue anymore. Previously I also got some crashes when switching between subd leveld in sculpt mode with some polygons hidden and VBO enabled, but I can't reproduce this either.. maybe bug in videocard drivers or something.

I just tested on official 2.70a and the second issue is still there!! It seems like polygon visibility flags are stored only in specific subdivision level or something like that. Could not reproduce first issue anymore. Previously I also got some crashes when switching between subd leveld in sculpt mode with some polygons hidden and VBO enabled, but I can't reproduce this either.. maybe bug in videocard drivers or something.

Antonis Ryakiotakis commented

2014-04-29 17:28:42 +02:00

I can confirm some illusive weird issue, I'll try to reproduce the case exactly.

Antonis Ryakiotakis commented

2014-04-29 17:31:58 +02:00

Nope, must have been me confused by using grab brush and going up and down across multires levels.

Gatis Kurzemnieks commented

2014-04-29 17:47:21 +02:00

Can you mask and hide parts of your mesh when in higher subdivision levels? I can't - mash is visible and polygons are hiding only in lower level.

Antonis Ryakiotakis commented

2014-04-29 17:52:49 +02:00

Even though I can, I am getting out of memory errors in OpenGL.

I think I may have an idea why this is happening, I'll check it out later.

Even though I can, I am getting out of memory errors in OpenGL. I think I may have an idea why this is happening, I'll check it out later.

Antonis Ryakiotakis commented

2014-05-05 20:16:06 +02:00

I tried to make some drawing corrections here, could you try a buildbot tomorrow to see if this persists?

Gatis Kurzemnieks commented

2014-05-06 14:17:36 +02:00

I tried the buildbot right now - there was no difference. As soon as I create and go to higher subd level in sculpt mode - all polies become visible. And when I go back to original level - they are hidden again.

I have geforce 780gtx if that makes difference

I tried the buildbot right now - there was no difference. As soon as I create and go to higher subd level in sculpt mode - all polies become visible. And when I go back to original level - they are hidden again. I have geforce 780gtx if that makes difference

Antonis Ryakiotakis commented

2014-05-06 14:30:57 +02:00

System information per our bug reporting template would be useful indeed.
That means a test file, memory amount, system, processor, even GPU driver version.

This could well be a memory limitation. It's totally curious because each face is tested against for visibility before drawing...I can't see how this could happen.
However I really don't have any more suggestions here. I can't reproduce the issue here and the changes I did last night should completely skip drawing parts of the mesh when totally hidden independently of driver.

Can you do a factory startup (and turn VBO on obviously) and see if the issue persists?

System information per our bug reporting template would be useful indeed. That means a test file, memory amount, system, processor, even GPU driver version. This could well be a memory limitation. It's totally curious because each face is tested against for visibility before drawing...I can't see how this could happen. However I really don't have any more suggestions here. I can't reproduce the issue here and the changes I did last night should completely skip drawing parts of the mesh when totally hidden independently of driver. Can you do a factory startup (and turn VBO on obviously) and see if the issue persists?

Antonis Ryakiotakis commented

2014-05-06 14:36:08 +02:00

Also another question (which would be already answered if you had attached a blend file). What draw mode is the viewport in?

Gatis Kurzemnieks commented

2014-05-06 14:44:20 +02:00

sculpt_scene.blend

Ok, I attached simple scene. For me - as soon as I go down to 0 subd view level - polygons are hidden. As soon as i go up - all becomes visible. Hiding works only in solid mode.
If i go to textured mode - all polygons are visible always. Also no masking is visible.

My system:
i7, 32gb ram, geforce 780gtx 3gb vram.
337.50 drivers version.

[sculpt_scene.blend](https://archive.blender.org/developer/F87246/sculpt_scene.blend) Ok, I attached simple scene. For me - as soon as I go down to 0 subd view level - polygons are hidden. As soon as i go up - all becomes visible. Hiding works only in solid mode. If i go to textured mode - all polygons are visible always. Also no masking is visible. My system: i7, 32gb ram, geforce 780gtx 3gb vram. 337.50 drivers version.

Antonis Ryakiotakis commented

2014-05-06 14:47:06 +02:00

Actually, please do fill in the details exactly as required in our bug report guidelines.. I can't go on by guesswork here.

Gatis Kurzemnieks commented

2014-05-06 14:57:51 +02:00

System Information
Windows 8.1 update 1 64bit
geForce 780gtx, 3GB vram

Also tested on MacBook Pro and got the same results:
MacBook Pro, i7, geForce 650m, 16gb ram, 512 Mb VRAM

Blender Version
Broken: v2.70.5 (Hash 7660218), all other versions
Worked: never

Short description of error

When hide polygons in sculpt mode, they are hidden only in subdivision level they were hidden in. As soon as you go up or down to other view subdivision level - all polygons become visible in viewport. This happens both with VBO enabled and disabled!!!
It is possible to hide polygons or view sculpt masking only in solid mode. When in textured or wireframe mode - everything is visible + no masking is visible.

Exact steps for others to reproduce the error
sculpt_scene.blend

If you open attached scene and whole monkey head is visible - that is error. Parts should be hidden. Go to subd level 0 and polygons should be hidden there.

**System Information** Windows 8.1 update 1 64bit geForce 780gtx, 3GB vram Also tested on MacBook Pro and got the same results: MacBook Pro, i7, geForce 650m, 16gb ram, 512 Mb VRAM **Blender Version** Broken: v2.70.5 (Hash 7660218), all other versions Worked: never **Short description of error** 1. When hide polygons in sculpt mode, they are hidden only in subdivision level they were hidden in. As soon as you go up or down to other view subdivision level - all polygons become visible in viewport. This happens both with VBO enabled and disabled!!! 2. It is possible to hide polygons or view sculpt masking only in solid mode. When in textured or wireframe mode - everything is visible + no masking is visible. **Exact steps for others to reproduce the error** [sculpt_scene.blend](https://archive.blender.org/developer/F87248/sculpt_scene.blend) If you open attached scene and whole monkey head is visible - that is error. Parts should be hidden. Go to subd level 0 and polygons should be hidden there.

Antonis Ryakiotakis commented

2014-05-06 15:00:29 +02:00

Something is very, very wrong with that file. Well, first of all it uses subsurf instead of multires but by removing that and adding a multires modifier I can see the issue..which is totally broken, I cannot even undo at moments.

It looks like data corruption but what would be more important is finding out how this can happen...Can you lay down the steps to create such a file?

Also, can you do a factory reset and see if the issues persist?

Something is very, very wrong with that file. Well, first of all it uses subsurf instead of multires but by removing that and adding a multires modifier I can see the issue..which is totally broken, I cannot even undo at moments. It looks like data corruption but what would be more important is finding out how this can happen...Can you lay down the steps to create such a file? Also, can you do a factory reset and see if the issues persist?

Antonis Ryakiotakis commented

2014-05-06 15:04:26 +02:00

OK now I can reproduce.

If user adds a subsurf modifier then it creates some sort of issue in sculpting.

This is a bug indeed, but the correct modifier to use for sculpting is multires. Also as you;ve noticed only solid mode supports correct masking and hiding currently.

OK now I can reproduce. If user adds a subsurf modifier then it creates some sort of issue in sculpting. This is a bug indeed, but the correct modifier to use for sculpting is multires. Also as you;ve noticed only solid mode supports correct masking and hiding currently.

Gatis Kurzemnieks commented

2014-05-06 15:07:07 +02:00

Hmm, I see - when I use multires. I used subsurf, because of default keyboard shortcuts (PageUp/Down in sculpt mode - they automatically add subsurf modifier).

Not sure what was wrong with the file - I did nothing there, just opened blender, added monkeyhead and entered sculpt mode.

Hmm, I see - when I use multires. I used subsurf, because of default keyboard shortcuts (PageUp/Down in sculpt mode - they automatically add subsurf modifier). Not sure what was wrong with the file - I did nothing there, just opened blender, added monkeyhead and entered sculpt mode.

Antonis Ryakiotakis commented

2014-05-06 15:11:45 +02:00

OK, that's an issue on itself I guess. I'll try to make the shortcuts add a multires modifier.

blender-admin commented

2014-05-08 18:15:46 +02:00

This issue was referenced by blender/blender-addons-contrib@0d85be5950

This issue was referenced by blender/blender-addons-contrib@0d85be59506efebf7df691f80ed24d12c767b3ae

blender-admin commented

2014-05-08 18:15:46 +02:00

This issue was referenced by 0d85be5950

This issue was referenced by 0d85be59506efebf7df691f80ed24d12c767b3ae

Antonis Ryakiotakis commented

2014-05-08 18:16:29 +02:00

Changed status from 'Open' to: 'Resolved'

Antonis Ryakiotakis closed this issue

2014-05-08 18:16:29 +02:00

Antonis Ryakiotakis commented

2014-05-08 18:16:29 +02:00

Closed by commit 0d85be5950.

Closed by commit 0d85be5950.

Antonis Ryakiotakis commented

2014-05-08 18:27:05 +02:00

It's not possible to prohibit users from using modifiers that disable optimal drawing. In that case, just added a warning on the modifier panel so at least users know that this is normal.

Antonis Ryakiotakis commented

2014-05-08 18:29:23 +02:00

Oh, also Ctrl + number and PageUp/PageDown keys now add a multires in sculpt mode. I hope this will mitigate any accidents in the future ;)

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Sculpt mode - hidden mesh parts unhide when sculpting if VBO enabled. #39950