Dynamic Sculpting: Inflate Brush artifacts --- could freeze blender #35100

New Issue

Leonard Siebeneicher · 2013-04-26T22:04:39+02:00

2013-04-26 22:04:39 +02:00

%%%--- Operating System, Graphics card ---
Ubuntu 13.04
Graphics Card: ATI RV630 [Radeon HD 3600 Series]

- Blender version with error, and version that worked ---

It occours in 2.66.6 (version 2.66 (sub 6), revision b'56271'. b'Release')

There is no blender version (with dynamic topology) without this bug.

- Short description of error ---

( Dynamic Topology activated. )

Artifacts generated during painting with the inflate brush. There is no way to clean up those artifacts within sculpting mode.
If you watch the artifact from the back-side, you will se a blob.

Painting over those artifacts takes some cpu effort. If you are unlucky (using 'dots', this bug could freeze blender.
Using the inflate brush could also ruin hours of work.

- Steps for others to reproduce the error (preferably based on attached .blend file) ---

1 - Load InflateBrushBug.blend

Pre-defined Setup in the blend file

    + It will put you into Sculpting mode automatically
    + The actual brush is set automatically to the Inflate brush
    + Stroke is set to airbrush. Strength is set to 1.

2 - Activate Dynamic Sculpting
3 - Draw over the surface with the inflate Brush

If you set stroke method to "dots" or "airbrush", the bug occours faster. It also occours on "space" with lower strength (around 3).
"collapse short edge" does not prevent the bug!

If you like, see this video.
http://www.youtube.com/watch?v=3W5NIrNqEp8&list=PLvTqAnaoAttpxyD2OYAOHWO3nsHDixxJ6

- If you like to see the bug instantly. ---

I started with a more general plane to show, that this bug is not limited to valleys.
There is a second attachment. (InflateBug-immediate.blend)
Load this file. Do same steps as above. If you paint into the bottom edge of the valley, the bug occours immediately.
I started this Bug Report basing on a plane to show that it affects sculpting in general.%%%

%%%--- Operating System, Graphics card --- Ubuntu 13.04 Graphics Card: ATI RV630 [Radeon HD 3600 Series] - Blender version with error, and version that worked --- It occours in 2.66.6 (version 2.66 (sub 6), revision b'56271'. b'Release') There is no blender version (with dynamic topology) without this bug. - Short description of error --- ( Dynamic Topology activated. ) Artifacts generated during painting with the inflate brush. There is no way to clean up those artifacts within sculpting mode. If you watch the artifact from the back-side, you will se a blob. Painting over those artifacts takes some cpu effort. If you are unlucky (using 'dots', this bug could freeze blender. Using the inflate brush could also ruin hours of work. - Steps for others to reproduce the error (preferably based on attached .blend file) --- 1 - Load InflateBrushBug.blend - Pre-defined Setup in the blend file ``` + It will put you into Sculpting mode automatically + The actual brush is set automatically to the Inflate brush + Stroke is set to airbrush. Strength is set to 1. ``` 2 - Activate Dynamic Sculpting 3 - Draw over the surface with the inflate Brush ``` ``` If you set stroke method to "dots" or "airbrush", the bug occours faster. It also occours on "space" with lower strength (around 3). "collapse short edge" does not prevent the bug! If you like, see this video. http://www.youtube.com/watch?v=3W5NIrNqEp8&list=PLvTqAnaoAttpxyD2OYAOHWO3nsHDixxJ6 - If you like to see the bug instantly. --- I started with a more general plane to show, that this bug is not limited to valleys. There is a second attachment. (InflateBug-immediate.blend) Load this file. Do same steps as above. If you paint into the bottom edge of the valley, the bug occours immediately. I started this Bug Report basing on a plane to show that it affects sculpting in general.%%%

Leonard Siebeneicher commented

2013-04-26 22:04:39 +02:00

Changed status to: 'Open'

blender-admin commented

2013-04-26 22:04:39 +02:00

#38121 was marked as duplicate of this issue

Leonard Siebeneicher commented

2013-04-28 00:40:55 +02:00

%%%This bug occours in traditional sculpt mode (no dynamic topology), too! Sorry. But, it wont freeze Blender!
If Bug occours in traditional sculpt, i could correct the artifacts by painting over the blobs (on its opposite site) with the smooth brush. It is easy and fast.

Trying 'collapse short edge', it prevents blender from freezing, too. Cleaning artifacts is more difficult. Using smooth brush and simplify brush.
Correcting the artifacts, accidents could happen ... I mean, fine shapes of a sculpting could be erased with the simplify brush.
Wouldnt it be more safe to disable dynamic sculpting for the inflate brush?

(A small patch. Please check it, am learning.
It should disable dynamic topolology for the inflate brush.
Works on my own blender build.
I hope the attachment will upload if I save changes.)

%%%

%%%This bug occours in traditional sculpt mode (no dynamic topology), too! Sorry. But, it wont freeze Blender! If Bug occours in traditional sculpt, i could correct the artifacts by painting over the blobs (on its opposite site) with the smooth brush. It is easy and fast. Trying 'collapse short edge', it prevents blender from freezing, too. Cleaning artifacts is more difficult. Using smooth brush and simplify brush. Correcting the artifacts, accidents could happen ... I mean, fine shapes of a sculpting could be erased with the simplify brush. Wouldnt it be more safe to disable dynamic sculpting for the inflate brush? ___ (A small patch. Please check it, am learning. It should disable dynamic topolology for the inflate brush. Works on my own blender build. I hope the attachment will upload if I save changes.) %%%

Antonis Ryakiotakis commented

2013-05-19 11:25:31 +02:00

%%%Confirmed here, on the immediate version I am getting a hang very easily if I scuplt at the central crease.%%%

Antonis Ryakiotakis commented

2013-05-19 13:03:13 +02:00

%%%Note, I don't think deactivating is the correct thing here. this looks like a general issue that should be fixed.%%%

Nicholas Bishop was unassigned by Sergey Sharybin

2014-05-29 10:55:33 +02:00

Antonis Ryakiotakis was assigned by Sergey Sharybin

2014-05-29 10:55:33 +02:00

Sergey Sharybin commented

2014-05-29 10:55:33 +02:00

Added subscriber: @Sergey

Sergey Sharybin commented

2014-05-29 10:55:33 +02:00

@Psy-Fi, we don't have nicholasbishop active anymore, hope you're fine if i re-assign the report to you :)

Antonis Ryakiotakis commented

2014-05-29 12:33:53 +02:00

Added subscribers: @MarcClintDion, @brecht, @brad_h

Antonis Ryakiotakis commented

2014-05-29 12:33:53 +02:00

◀ Merged tasks: #38121.

Antonis Ryakiotakis was unassigned by Julian Eisel

2015-03-20 00:59:14 +01:00

Nicholas Bishop was assigned by Julian Eisel

2015-03-20 00:59:14 +01:00

Julian Eisel commented

2015-03-20 00:59:14 +01:00

Added subscriber: @JulianEisel

Julian Eisel commented

2015-03-20 00:59:14 +01:00

Well, think @NicholasBishop is active again, so let's bring him back to the game! :)

Sergey Sharybin commented

2015-03-20 08:39:52 +01:00

@siebeneicher, are you actually able to reproduce the issue with current stable release 2.73a and 2.74-RC2 from download.blender.org/release/Blender2.74 ?

Or maybe someone else can reproduce the issue?

@siebeneicher, are you actually able to reproduce the issue with current stable release 2.73a and 2.74-RC2 from download.blender.org/release/Blender2.74 ? Or maybe someone else can reproduce the issue?

marc dion commented

2015-03-20 12:35:22 +01:00

It still easy to do. Sculpting on a plane using Inflate brush and Dynatopo from top Ortho view. Blobs appear on the back side of the area that is being worked on.

It still easy to do. Sculpting on a plane using Inflate brush and Dynatopo from top Ortho view. Blobs appear on the back side of the area that is being worked on. ![inflateBlobs.png](https://archive.blender.org/developer/F153385/inflateBlobs.png)

Aaron Carlisle commented

2015-09-10 20:03:34 +02:00

Added subscriber: @Blendify

Aaron Carlisle commented

2015-09-10 20:03:34 +02:00

Any news here?

Tom Musgrove commented

2017-03-18 00:00:01 +01:00

Added subscriber: @TomMusgrove

Tom Musgrove commented

2017-03-18 00:00:01 +01:00

Poke - browsing old bugs is this still an issue?

Leonard Siebeneicher commented

2017-03-18 07:48:47 +01:00

yes.

I could trigger same bug on Blender 2.78c. Used perspective view.

See ...

{F513025}

yes. I could trigger same bug on Blender 2.78c. Used perspective view. ```Blender hash e92f2352830 ``` See ... {F513025}

Bob Smith commented

2017-09-13 21:16:07 +02:00

Added subscriber: @uvwxyz

Bob Smith commented

2017-09-13 21:16:07 +02:00

I think it's doing what It's supposed to. You can mangle up the mesh using any brush type if you sculpt a certain way with particular settings.

Try the following settings with dyntopo (I got perfectly clean results with them):

Strength: 3
Autosmooth: 1
Stroke method: Space
Spacing: 1%

Maybe the default settings should be changed to these?

I think it's doing what It's supposed to. You can mangle up the mesh using *any* brush type if you sculpt a certain way with particular settings. Try the following settings with dyntopo (I got perfectly clean results with them): - Strength: 3 - Autosmooth: 1 - Stroke method: Space - Spacing: 1% Maybe the default settings should be changed to these?

Nicholas Bishop was unassigned by Dalai Felinto

2019-12-23 16:39:00 +01:00

Jeroen Bakker commented

2020-01-10 14:47:30 +01:00

Added subscribers: @PabloDobarro, @Jeroen-Bakker

Jeroen Bakker commented

2020-01-10 14:47:30 +01:00

@PabloDobarro Is this still an issue?

Jeroen Bakker commented

2020-01-10 15:01:16 +01:00

Dyntopology is not maintained so marking this as known issue. It is advised to use regular sculpting currently

Leonard Siebeneicher commented

2020-01-11 00:47:06 +01:00

Inflate brush still creates blob in newer Blender. But there is an interesting difference now.
It looks like voxel remesher could fix the blob artifact.

This blend file works with voxel remesher …
blob_and_remesh.blend

Inflate brush still creates blob in newer Blender. But there is an interesting difference now. It looks like voxel remesher could fix the blob artifact. This blend file works with voxel remesher … [blob_and_remesh.blend](https://archive.blender.org/developer/F8269169/blob_and_remesh.blend)

Philipp Oeser removed the

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Dynamic Sculpting: Inflate Brush artifacts --- could freeze blender #35100