GPU subdivision: vertex paintmask: vertices (or their selection status) not visible in weightpaint/vertexpaint #102519

New Issue

System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1650 Ti with Max-Q Design/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 516.94

Blender Version
Broken: version: 3.3.0, branch: master, commit date: 2022-09-06 15:39, hash: 0759f671ce
Broken: version: 3.1.0

Short description of error
In Weight/Vertex Paint mode, with Vertex Selection ON, vertices are not visible if mesh has a subdivision modifier and GPU subdivision is used.
Vertices might be visible in weightpaint (depending on GPU used), when they are, selected vs. unselected is looking the same, they cannot be distinguished.
(the selection is actually working for painting though)

Exact steps for others to reproduce the error

#102519.blend

open .blend
enter vertex paintmode >> no verts are visible (even if you can select them clicking in the right spots)
enter weight paintmode >> verts are invisible (GeForce GTX 1650), visible (GeForce RTX 3080) but selected points draw the same as unselected
(painting would actually respect the selection that is made though)

**System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1650 Ti with Max-Q Design/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 516.94 **Blender Version** Broken: version: 3.3.0, branch: master, commit date: 2022-09-06 15:39, hash: `0759f671ce` Broken: version: 3.1.0 **Short description of error** In Weight/Vertex Paint mode, with Vertex Selection ON, vertices are not visible if mesh has a subdivision modifier and GPU subdivision is used. Vertices might be visible in weightpaint (depending on GPU used), when they are, selected vs. unselected is looking the same, they cannot be distinguished. (the selection is actually working for painting though) **Exact steps for others to reproduce the error** [#102519.blend](https://archive.blender.org/developer/F13917603/T102519.blend) - open .blend - enter vertex paintmode >> no verts are visible (even if you can select them clicking in the right spots) - enter weight paintmode >> verts are invisible (GeForce GTX 1650), visible (GeForce RTX 3080) but selected points draw the same as unselected - (painting would actually respect the selection that is made though)

Added subscriber: @AndyBrunton

Added subscriber: @lichtwerk

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

I can see the verts in a situation like this:

#102519.blend

But I cant really select them in case Preferences > Viewport > Subdivision > GPU Subdivision is checked.
(will check if this is a known thing with GPU subdivision...)

For now: does it make a difference on your side? (unchecking Preferences > Viewport > Subdivision > GPU Subdivision)

I can see the verts in a situation like this: ![image.png](https://archive.blender.org/developer/F13916991/image.png) [#102519.blend](https://archive.blender.org/developer/F13916994/T102519.blend) But I cant really select them in case `Preferences` > `Viewport` > `Subdivision` > `GPU Subdivision` is checked. (will check if this is a known thing with GPU subdivision...) For now: does it make a difference on your side? (unchecking `Preferences` > `Viewport` > `Subdivision` > `GPU Subdivision`)

Hey - thank you, that actually fixes the issue I was having!

In #102519#1446196, @lichtwerk wrote:
But I cant really select them in case Preferences > Viewport > Subdivision > GPU Subdivision is checked.
(will check if this is a known thing with GPU subdivision...)

note that selection actually works (but is not really shown (selected/unselected cannot be distinguished)

> In #102519#1446196, @lichtwerk wrote: > But I cant really select them in case `Preferences` > `Viewport` > `Subdivision` > `GPU Subdivision` is checked. > (will check if this is a known thing with GPU subdivision...) note that selection actually works (but is not really shown (selected/unselected cannot be distinguished)

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

Also note that I can confirm the missing vertices in vertexpaint mode

Added subscriber: @kevindietrich

@kevindietrich : mind checking?

Setting to High priority (even if the bug appears to be a bit older...)

@kevindietrich : mind checking? Setting to High priority (even if the bug appears to be a bit older...)

Added subscriber: @PratikPB2123

There was a report earlier for paint mask #99016 (Regression: GPU subdivision: paint mask selection not visible when mesh is smooth shaded)

In #102519#1446392, @PratikPB2123 wrote:
There was a report earlier for paint mask #99016 (Regression: GPU subdivision: paint mask selection not visible when mesh is smooth shaded)

That one is for face paintmask selection, now it is about verts

> In #102519#1446392, @PratikPB2123 wrote: > There was a report earlier for paint mask #99016 (Regression: GPU subdivision: paint mask selection not visible when mesh is smooth shaded) That one is for **face** paintmask selection, now it is about **verts**

This was marked as a regression, and as working in Blender 3.0.1,
but AFAIK GPU subdivision was implemented in 3.1 and this has never worked.

This was marked as a regression, and as working in Blender 3.0.1, but AFAIK GPU subdivision was implemented in 3.1 and this has never worked.

Yep, regression as in "default behavior broke"

This issue was referenced by 6c4c09b2df

This issue was referenced by 6c4c09b2dfa3c657fae7187467d71a26a254fa34

Changed status from 'Confirmed' to: 'Resolved'

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

GPU subdivision: vertex paintmask: vertices (or their selection status) not visible in weightpaint/vertexpaint #102519