Weight Painting intermittent issues with brush, not adding or subtracting weight, not influencing correct areas #72524

New Issue

Casey Frost · 2019-12-17T21:14:03+01:00

Casey Frost commented

2019-12-17 21:14:03 +01:00

System Information
Operating system: Windows 10 Pro
Graphics card: RTX 2080ti + 3x GTX 1080Ti - Running 4 monitors and a pen tablet at three different resolutions using outputs from two GPUs (4k, 1440p, 1080p)

Blender Version
Broken: 2.81 stable
Worked: 2.80

Short description of error

I have had numerous issues with weight painting in 2.81, however duplicating them has been problematic as this crops up intermittently. In this example, I saved this working file right at the moment I started having problems. Here I can neither add nor subtract weight with the brush in Weight paint mode from a certain distance from the model.

In other instances, I've had issues with the brush not painting over the vertices it's over. I use a hard falloff brush, so anything inside the circle gets painted, anything outside gets nothing. Essentially, it acts like the circle where the brush is being displayed, is not where the circle actually is, if that makes sense.

Exact steps for others to reproduce the error

I tried exporting this to it's own file, but that seems to fix it. It has to be in the full working file I'll provide here. You should hopefully be able to open the file, already be in weight painting mode, with the brush set up, over some masked vertices ready to add or subtract. Try switching the brush to add, and zoomed in fairly close, add some weight, and nothing happens. However, zoom out and do the same thing, and watch weight be added.

You can kind of jump around and try rigging other parts of the car, I've been having issues with it off and on for the past few days.

70sNewYorkers.blend

**System Information** Operating system: Windows 10 Pro Graphics card: RTX 2080ti + 3x GTX 1080Ti - Running 4 monitors and a pen tablet at three different resolutions using outputs from two GPUs (4k, 1440p, 1080p) **Blender Version** Broken: 2.81 stable Worked: 2.80 **Short description of error** I have had numerous issues with weight painting in 2.81, however duplicating them has been problematic as this crops up intermittently. In this example, I saved this working file right at the moment I started having problems. Here I can neither add nor subtract weight with the brush in Weight paint mode from a certain distance from the model. In other instances, I've had issues with the brush *not painting over the vertices it's over*. I use a hard falloff brush, so anything inside the circle gets painted, anything outside gets nothing. Essentially, it acts like the circle where the brush is being displayed, is not where the circle actually is, if that makes sense. **Exact steps for others to reproduce the error** *I tried exporting this to it's own file, but that seems to fix it. It has to be in the full working file I'll provide here. You should hopefully be able to open the file, already be in weight painting mode, with the brush set up, over some masked vertices ready to add or subtract. Try switching the brush to add, and zoomed in fairly close, add some weight, and nothing happens. However, zoom out and do the same thing, and watch weight be added.* You can kind of jump around and try rigging other parts of the car, I've been having issues with it off and on for the past few days. [70sNewYorkers.blend](https://archive.blender.org/developer/F8229861/70sNewYorkers.blend)

Casey Frost commented

2019-12-17 21:14:03 +01:00

Added subscriber: @HardRooster

Germano Cavalcante commented

2019-12-19 15:17:09 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2019-12-19 15:17:09 +01:00

I don't know if I get it right, but I believe this issue is related to the same issue described in #70128
#72121 is a variant of the same problem.

I don't know if I get it right, but I believe this issue is related to the same issue described in #70128 #72121 is a variant of the same problem.

Germano Cavalcante commented

2019-12-28 20:38:31 +01:00

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

Germano Cavalcante closed this issue

2019-12-28 20:38:31 +01:00

Germano Cavalcante self-assigned this 2019-12-28 20:38:31 +01:00

Germano Cavalcante commented

2019-12-28 20:38:31 +01:00

I reproduced this bug in the latest official release, but not the latest daily build, so it appears the bug has been fixed already :)

Please try the latest daily build: https://builder.blender.org/download/

If the problem persists, please let us know so we can re-open the report. Don't forget to mention the specific version you tested again.

I reproduced this bug in the latest official release, but not the latest daily build, so it appears the bug has been fixed already :) Please try the latest daily build: https://builder.blender.org/download/ If the problem persists, please let us know so we can re-open the report. Don't forget to mention the specific version you tested again.

Philipp Oeser commented

2019-12-28 21:32:43 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2019-12-28 21:32:43 +01:00

Changed status from 'Resolved' to: 'Confirmed'

Philipp Oeser reopened this issue

2019-12-28 21:32:43 +01:00

Philipp Oeser commented

2019-12-28 21:32:44 +01:00

I can still reproduce this.

System Information
Operating system: Linux-5.3.12-200.fc30.x86_64-x86_64-with-fedora-30-Thirty 64 Bits
Graphics card: GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.31

Blender Version
Broken: version: 2.82 (sub 6), branch: master, commit date: 2019-12-27 20:38, hash: c2a37867f2

I can still reproduce this. **System Information** Operating system: Linux-5.3.12-200.fc30.x86_64-x86_64-with-fedora-30-Thirty 64 Bits Graphics card: GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.31 **Blender Version** Broken: version: 2.82 (sub 6), branch: master, commit date: 2019-12-27 20:38, hash: c2a37867f2

Germano Cavalcante commented

2019-12-29 12:08:11 +01:00

Investigating again, although the recent build indicated does not work well (2.82 sub 6), it works much better than the 2.81.
I will continue investigating to see if I find something...

Investigating again, although the recent build indicated does not work well (2.82 sub 6), it works much better than the 2.81. I will continue investigating to see if I find something...

Casey Frost commented

2020-01-09 18:56:25 +01:00

Did a fix get added to 2.81a? I downloaded that and at first glance things seem to be working. I have a new project to work on, I'll likely get into weight painting it tomorrow so I can report back how that works, and if it's not working right I can give the daily build a go as well and report back my findings.

Germano Cavalcante commented

2020-01-09 19:11:29 +01:00

The patch is being analyzed and needs some adjustments.
The problem is not that serious.
The code works as designed.
What happens is that the affected vertices are tested within a cylinder rather than a cone as expected in the perspective projection.
And this problem is only observed under very specific conditions.

The patch is being analyzed and needs some adjustments. The problem is not that serious. The code works as designed. What happens is that the affected vertices are tested within a cylinder rather than a cone as expected in the perspective projection. And this problem is only observed under very specific conditions.

Philipp Oeser removed the

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Weight Painting intermittent issues with brush, not adding or subtracting weight, not influencing correct areas #72524