Draw brush with 0 weight doesn't show when using zero weight overlay #120618

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Daniel Ulrich · 2024-04-13T21:29:36+02:00

Daniel Ulrich commented

2024-04-13 21:29:36 +02:00

System Information
Operating system: Windows 10
Graphics card: Nvidia 4080

Blender Version
Broken: 4.1
Worked: I don't think it ever has
When using the draw brush with 0 weight with Zero Weights overlay enabled, the overlay wouldn't show black (0) weights. When using the subtract brush it would show them just fine

Exact steps for others to reproduce the error
Add any object, create a vertex group with a value of 1. Enable Zero Weights overlay on active. Using the draw brush with the weight set to 0 try painting the weights. Now try the subtract brush set to 1.

**System Information** Operating system: Windows 10 Graphics card: Nvidia 4080 **Blender Version** Broken: 4.1 Worked: I don't think it ever has When using the draw brush with 0 weight with Zero Weights overlay enabled, the overlay wouldn't show black (0) weights. When using the subtract brush it would show them just fine **Exact steps for others to reproduce the error** Add any object, create a vertex group with a value of 1. Enable Zero Weights overlay on active. Using the draw brush with the weight set to 0 try painting the weights. Now try the subtract brush set to 1.

drawsubstract.gif

611 KiB

Daniel Ulrich added the

labels 2024-04-13 21:29:36 +02:00

YimingWu commented

2024-04-15 04:26:54 +02:00

Can confirm. And looks like whether the vertex weight is displayed as black or not they are still in the vertex group.

YimingWu added

Module

Sculpt, Paint & Texture

and removed

labels 2024-04-15 04:28:45 +02:00

YimingWu commented

2024-04-15 05:15:13 +02:00

Took a bit digging, looks like it's just that mixing is not as strong due to pressure and brush fall off. So if you Draw the 0 weight brush repeatedly, the value would eventually return to completely 0. So considering this not to be a bug.

I made a quick print for each time a specific vertex is touched, you can see as the value gets smaller, it's converging to 0 slower, but eventually it gets there.

0.938686490
0.996896684
0.943380237
0.246416599
0.134316921
0.019344907
0.011724274
0.009167921
0.001208893
0.001098510
0.000327714
0.000049107
0.000000482
0.000000003
0.000000003
0.000000003
0.000000002
0.000000001
0.000000000
0.000000000

Will close this issue for now since it's actually not a bug, but feel free to comment further :D

Took a bit digging, looks like it's just that mixing is not as strong due to pressure and brush fall off. So if you `Draw` the 0 weight brush repeatedly, the value would eventually return to completely 0. So considering this not to be a bug. I made a quick print for each time a specific vertex is touched, you can see as the value gets smaller, it's converging to 0 slower, but eventually it gets there. ``` 0.938686490 0.996896684 0.943380237 0.246416599 0.134316921 0.019344907 0.011724274 0.009167921 0.001208893 0.001098510 0.000327714 0.000049107 0.000000482 0.000000003 0.000000003 0.000000003 0.000000002 0.000000001 0.000000000 0.000000000 ``` Will close this issue for now since it's actually not a bug, but feel free to comment further :D

YimingWu closed this issue

2024-04-15 05:15:17 +02:00

Blender Bot added

and removed

labels 2024-04-15 05:15:19 +02:00

Daniel Ulrich commented

2024-04-15 06:08:17 +02:00

Using a mouse it took me 70 clicks and I was getting nowhere close to what 1 click of subtract was giving me. Arguably the 2 should be consistent. Not sure if massive inconsistencies qualify as a bug though. I mean we can just sweep it under the rug and hope for someone to pick it up by chance sometime in the future, not sure what that would accomplish.

70.gif

3.6 MiB

YimingWu commented

2024-04-15 06:13:48 +02:00

You could try setting the falloff to constant and you should be able to get rid of it in one click.

Daniel Ulrich commented

2024-04-15 06:17:26 +02:00

That doesn't make it consistent, only more tedious (having to set falloff just because of 1 operation). I could also not use the draw bursh but switch to subtract. The point was to report something that's broken, and it still is.

I understand your reasoning, and if the bug report regulations say to ignore anything that doesn't fall under certain criteria I understand of course. It's just not the best approach imo.

That doesn't make it consistent, only more tedious (having to set falloff just because of 1 operation). I could also not use the draw bursh but switch to subtract. The point was to report something that's broken, and it still is. I understand your reasoning, and if the bug report regulations say to ignore anything that doesn't fall under certain criteria I understand of course. It's just not the best approach imo.

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Draw brush with 0 weight doesn't show when using zero weight overlay #120618