Vertex painting causes mesh to flicker #89624

New Issue

Wykrhm Reddy · 2021-07-03T06:57:32+02:00

Wykrhm Reddy commented

2021-07-03 06:57:32 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.11

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-07-02 18:27, hash: 5f5cf21a83
Worked: Probably the last one? It was working not that long ago (E.g.: d08cc63e2f).

Short description of error
Any vertex painting on any mesh causes that mesh to flicker rapidly.
00-18-51.mp4

Exact steps for others to reproduce the error

Create any mesh (or use default Cube).
Go to vertex painting.
Enable the "Show Wire" option of the the Vertex Paint Viewport Overlays
Paint.
The object will flicker.

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 471.11 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-07-02 18:27, hash: `5f5cf21a83` Worked: Probably the last one? It was working not that long ago (E.g.: `d08cc63e2f`). **Short description of error** Any vertex painting on any mesh causes that mesh to flicker rapidly. [00-18-51.mp4](https://archive.blender.org/developer/F10225029/00-18-51.mp4) **Exact steps for others to reproduce the error** 1. Create any mesh (or use default Cube). 2. Go to vertex painting. 3. Enable the "Show Wire" option of the the Vertex Paint Viewport Overlays 4. Paint. The object will flicker.

Wykrhm Reddy commented

2021-07-03 06:57:32 +02:00

Added subscriber: @Wyk

Philipp Oeser commented

2021-07-06 14:02:44 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2021-07-06 14:02:44 +02:00

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

Philipp Oeser commented

2021-07-06 14:02:44 +02:00

Cannot reproduce here

**System Information**
Operating system: Linux-5.13.0-0.rc6.45.fc35.x86_64-x86_64-with-glibc2.33.9000 64 Bits
Graphics card: NVIDIA GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 465.31
version: 3.0.0 Alpha, branch: master, commit date: 2021-07-02 18:27, hash: `rB5f5cf21a833f` also checked current master

Does this happen on any mesh?
Has the GPU driver been updated recently (maybe it is a problem with the 471.11 though unlikely)?
Please try with File → Defaults → Load Factory Settings to see if you still can reproduce this issue.
which viewport shading mode are you in? (maybe a small screencapture of what this flickering looks like might also help)

Cannot reproduce here ``` **System Information** Operating system: Linux-5.13.0-0.rc6.45.fc35.x86_64-x86_64-with-glibc2.33.9000 64 Bits Graphics card: NVIDIA GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 465.31 version: 3.0.0 Alpha, branch: master, commit date: 2021-07-02 18:27, hash: `rB5f5cf21a833f` also checked current master ``` - Does this happen on **any** mesh? - Has the GPU driver been updated recently (maybe it is a problem with the 471.11 though unlikely)? - Please try with File → Defaults → Load Factory Settings to see if you still can reproduce this issue. - which viewport shading mode are you in? (maybe a small screencapture of what this flickering looks like might also help)

Wykrhm Reddy commented

2021-07-06 16:57:38 +02:00

This comment was removed by @Wyk

*This comment was removed by @Wyk*

Wykrhm Reddy commented

2021-07-06 18:01:59 +02:00

Hey Philipp,

I found the issue. It is persistent even in factory default setup.

The flickering of the mesh happens when the "Show Wire" option of the the Vertex Paint Viewport Overlays is turned on.

Hey Philipp, I found the issue. It is persistent even in factory default setup. The flickering of the mesh happens when the "Show Wire" option of the the Vertex Paint Viewport Overlays is turned on.

Philipp Oeser commented

2021-07-15 14:04:58 +02:00

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

Philipp Oeser commented

2021-07-15 14:16:46 +02:00

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

Philipp Oeser commented

2021-07-15 14:16:46 +02:00

Still cannot reproduce.

That Show Wire has its quirks. Just asking: does it flicker for you on both cases? (when the option is ON and no wires are visible vs. when the option is ON and wires are actually visible -- for what I mean by this, please have a look at #88385 (overlay.show_paint_wire doesn't work in vertex paint modes depending on edit mode selection)).
Also: could you show the flicker in action (short screencast might help here).
Thx in advance!

Still cannot reproduce. That `Show Wire` has its quirks. Just asking: does it flicker for you on both cases? (when the option is ON and no wires are visible vs. when the option is ON and wires are actually visible -- for what I mean by this, please have a look at #88385 (overlay.show_paint_wire doesn't work in vertex paint modes depending on edit mode selection)). Also: could you show the flicker in action (short screencast might help here). Thx in advance!

Wykrhm Reddy commented

2021-07-15 14:21:10 +02:00

Here's a screen cap of the issue: 00-18-51.mp4

The wires are not actually visible in either case. Whether the option is turned on or off. The flicker happens when the operator is enabled. But no flicker when it ain't.

And I can confirm the issue in the other report you linked too. The "Show Wire" no longer displays the wireframe at all.

Here's a screen cap of the issue: [00-18-51.mp4](https://archive.blender.org/developer/F10225029/00-18-51.mp4) The wires are not actually visible in either case. Whether the option is turned on or off. The flicker happens when the operator is enabled. But no flicker when it ain't. And I can confirm the issue in the other report you linked too. The "Show Wire" no longer displays the wireframe at all.

Philipp Oeser commented

2021-07-15 15:21:47 +02:00

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

Philipp Oeser commented

2021-07-15 15:21:47 +02:00

The "Show Wire" no longer displays the wireframe at all

That is a regression actually (thx noting), will handle in the other report though.

> The "Show Wire" no longer displays the wireframe at all That is a regression actually (thx noting), will handle in the other report though.

Philipp Oeser commented

2021-07-15 16:34:50 +02:00

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

Philipp Oeser commented

2021-07-15 16:34:50 +02:00

Added subscriber: @Jeroen-Bakker

Philipp Oeser commented

2021-07-15 16:34:50 +02:00

In #89624#1191612, @lichtwerk wrote:

The "Show Wire" no longer displays the wireframe at all

That is a regression actually (thx noting), will handle in the other report though.

This changed in 44d2479dc3 (now it does not draw at all).
Suspicion is that this commit might cause the flickering for you, @Jeroen-Bakker: do you think this might be the case?
@Wyk : Could you verify that this was still working in 2.93?

> In #89624#1191612, @lichtwerk wrote: >> The "Show Wire" no longer displays the wireframe at all > That is a regression actually (thx noting), will handle in the other report though. This changed in 44d2479dc3 (now it does not draw **at all**). Suspicion is that this commit might cause the flickering for you, @Jeroen-Bakker: do you think this might be the case? @Wyk : Could you verify that this was still working in 2.93?

Philipp Oeser commented

2021-07-15 16:41:10 +02:00

In #89624#1191692, @lichtwerk wrote:

In #89624#1191612, @lichtwerk wrote:

The "Show Wire" no longer displays the wireframe at all

That is a regression actually (thx noting), will handle in the other report though.

This changed in 44d2479dc3 (now it does not draw at all).
Suspicion is that this commit might cause the flickering for you, @Jeroen-Bakker: do you think this might be the case?
@Wyk : Could you verify that this was still working in 2.93?

reported separately in #89880 (overlay.show_paint_wire doesn't work anymore)

> In #89624#1191692, @lichtwerk wrote: >> In #89624#1191612, @lichtwerk wrote: >>> The "Show Wire" no longer displays the wireframe at all >> That is a regression actually (thx noting), will handle in the other report though. > > This changed in 44d2479dc3 (now it does not draw **at all**). > Suspicion is that this commit might cause the flickering for you, @Jeroen-Bakker: do you think this might be the case? > @Wyk : Could you verify that this was still working in 2.93? reported separately in #89880 (overlay.show_paint_wire doesn't work anymore)

Wykrhm Reddy commented

2021-07-15 16:50:34 +02:00

Okay. I did some testing across 2.93 and 3.0 and there's some massive inconsistencies / irregularities here.

But to start with -- The 'Show Wire' does not work in 2.93 either but at least the flickering does not happen in 2.93. Even when Show Wire is enabled.

But here are the irregularities.

Geometry Wireframe check box enables and disables wireframe as intended.
However, the Wireframe slider from 0 to 1 does nothing. In 2.93 and 3.0
The opacity slider from 0 to 1 works as intended.
In weight paint mode, setting opacity slider to 0 actually reveal the wireframe that previously used to show with "Show Wire" in paint modes. Irrespective of whether Show Wire is enabled or disabled.
But the same thing does not show the wireframe at all in Vertex Paint mode. Even with opacity set to 0.

It's all messed up for some reason.

Intended method of working should be:

Geometry Wireframe - should decide the extent of the wireframe on the mesh.
Geometry Opacity - should decide the opacity of the wireframe.
Weight Paint / Vertex Paint Show Wire - should show wireframe irrespective of the setting on Geometry Wireframe.

That's how it worked previously at least. Can't remember which version it properly on last.

Okay. I did some testing across 2.93 and 3.0 and there's some massive inconsistencies / irregularities here. But to start with -- The 'Show Wire' does not work in 2.93 either but at least the flickering does not happen in 2.93. Even when Show Wire is enabled. But here are the irregularities. 1. Geometry Wireframe check box enables and disables wireframe as intended. 2. However, the Wireframe slider from 0 to 1 does nothing. In 2.93 and 3.0 3. The opacity slider from 0 to 1 works as intended. 4. In weight paint mode, setting opacity slider to 0 actually reveal the wireframe that previously used to show with "Show Wire" in paint modes. Irrespective of whether Show Wire is enabled or disabled. 5. But the same thing does not show the wireframe at all in Vertex Paint mode. Even with opacity set to 0. It's all messed up for some reason. Intended method of working should be: 1. Geometry Wireframe - should decide the extent of the wireframe on the mesh. 2. Geometry Opacity - should decide the opacity of the wireframe. 3. Weight Paint / Vertex Paint Show Wire - should show wireframe irrespective of the setting on Geometry Wireframe. That's how it worked previously at least. Can't remember which version it properly on last.

Philipp Oeser commented

2021-07-15 16:55:00 +02:00

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