Subdivision modifier and multirres modifier broke for weight paint, vertex paint and sculpt #67934

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SavMartin · 2019-07-30T13:35:06+02:00

SavMartin commented

2019-07-30 13:35:06 +02:00

System Information
Operating system: Linux-4.15.0-55-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce GTX 560 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.116

Blender Version
Broken: version: 2.81 (sub 0), branch: master, commit date: 2019-07-30 11:00, hash: 51be0a765e
Worked: (optional)

2019-07-30 12-30-10.mp4

**System Information** Operating system: Linux-4.15.0-55-generic-x86_64-with-debian-buster-sid 64 Bits Graphics card: GeForce GTX 560 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.116 **Blender Version** Broken: version: 2.81 (sub 0), branch: master, commit date: 2019-07-30 11:00, hash: `51be0a765e` Worked: (optional) [2019-07-30 12-30-10.mp4](https://archive.blender.org/developer/F7637390/2019-07-30_12-30-10.mp4)

SavMartin commented

2019-07-30 13:35:06 +02:00

Added subscriber: @SavMartin

Gavin Scott commented

2019-07-30 23:34:16 +02:00

Added subscriber: @GavinScott

Gavin Scott commented

2019-07-30 23:34:16 +02:00

Is the difference in behavior simply that 2.80 has a default brush Strength of 1.0 vs the 0.7 of 2.79? If I turn it down to 0.7 the behavior looks the same as in your 2.79 example. Or perhaps I'm not understanding exactly what the problem is.

Is the difference in behavior simply that 2.80 has a default brush Strength of 1.0 vs the 0.7 of 2.79? If I turn it down to 0.7 the behavior looks the same as in your 2.79 example. Or perhaps I'm not understanding exactly what the problem is. ![image.png](https://archive.blender.org/developer/F7638208/image.png)

SavMartin commented

2019-07-31 00:54:09 +02:00

You cannot see that the problem is that in version 2.80 it is not possible to paint on the vertices subdivided with the modifier. ?

SavMartin changed title from ~~Bad Presicion where vertex ara in subdivicion modo when weigth paint~~ to Bad Presicion where vertex are in subdivicion modo when weigth paint

2019-07-31 00:54:49 +02:00

SavMartin changed title from ~~Bad Presicion where vertex are in subdivicion modo when weigth paint~~ to Bad Presicion where vertex are in subdivicion mode when weigth paint

2019-07-31 00:56:55 +02:00

SavMartin commented

2019-07-31 01:05:30 +02:00

When you subdivide a box, the vertices change places. but the "weigth Paint" mode thinks that the vertices are in the box without subdividing , and don't paint , it dosen't matter the Strength

Gavin Scott commented

2019-07-31 01:40:35 +02:00

Thanks, that wasn't instantly obvious with just the video and no problem description. Indeed, this does seem different/broken in 2.80 compared to the 2.79 behavior.

Painting on top of a subdiv modifier is a bit tricky since not all the vertices you see are real. Would be cool if there was a way to highlight the subdiv vertices that correspond to the un-subdivided ones. Or have the paint modes work the way Edit mode does.

Thanks, that wasn't instantly obvious with just the video and no problem description. Indeed, this does seem different/broken in 2.80 compared to the 2.79 behavior. Painting on top of a subdiv modifier is a bit tricky since not all the vertices you see are real. Would be cool if there was a way to highlight the subdiv vertices that correspond to the un-subdivided ones. Or have the paint modes work the way Edit mode does.

Tonatiuh de San Julián commented

2019-07-31 01:43:50 +02:00

Added subscriber: @TonatiuhdeSanJulian

Tonatiuh de San Julián commented

2019-07-31 01:43:50 +02:00

I can confirm this bug in 2.80 official release in Ubuntu 18.04 in the official snap made by the blender foundation, when there is present a subdiv modifier there is no way to paint it with precision, or sometimes even paint, see this video:
vokoscreen-2019-07-31_01-37-49.mp4

I can confirm this bug in 2.80 official release in Ubuntu 18.04 in the official snap made by the blender foundation, when there is present a subdiv modifier there is no way to paint it with precision, or sometimes even paint, see this video: [vokoscreen-2019-07-31_01-37-49.mp4](https://archive.blender.org/developer/F7638334/vokoscreen-2019-07-31_01-37-49.mp4)

Tonatiuh de San Julián commented

2019-07-31 01:47:55 +02:00

It is also present with the multirres modifier :(

Tonatiuh de San Julián commented

2019-07-31 02:01:16 +02:00

Well I found more problems:
With the subdivisions modifier:
1 You can not do Vertex weigh paint properly
2 You can not do vertex paint properly
3 You can not sculpt properly
With the multirresolution modifier:
1 you can not do vertex weigh paint properly
2 you can not do vertex paint properly
3 you can sculpt without any problem

So my guest is that there are some operators that cant see the vertex, and other can? so it can be fixed?

Well I found more problems: With the subdivisions modifier: 1 You can not do Vertex weigh paint properly 2 You can not do vertex paint properly 3 You can not sculpt properly With the multirresolution modifier: 1 you can not do vertex weigh paint properly 2 you can not do vertex paint properly 3 you can sculpt without any problem So my guest is that there are some operators that cant see the vertex, and other can? so it can be fixed?

Tonatiuh de San Julián commented

2019-07-31 02:05:51 +02:00

Only sculpt in multirres modifier is working

vokoscreen-2019-07-31_02-03-19.mp4

Only sculpt in multirres modifier is working [vokoscreen-2019-07-31_02-03-19.mp4](https://archive.blender.org/developer/F7638357/vokoscreen-2019-07-31_02-03-19.mp4)

SavMartin changed title from ~~Bad Presicion where vertex are in subdivicion mode when weigth paint~~ to Subdivision modifier and multirres modifier broke for weight paint, vertex paint and sculpt

2019-07-31 02:30:37 +02:00

Francisco Santibañez commented

2019-07-31 06:42:28 +02:00

Added subscriber: @FranciscoSantibanez

Francisco Santibañez commented

2019-07-31 06:42:28 +02:00

I have the same problem, this is a complex situation of trafficking, I hope they solve it as soon as possible.

Juan Gea commented

2019-08-08 20:58:44 +02:00

Added subscriber: @juang3d

Juan Gea commented

2019-08-08 20:58:44 +02:00

Ooops!

This is a rather BIG bug from a rigger/character artist stand point!

A good armature weight painting needs to be done with subdivisions enabled to carefully see the deformation of the mesh, I hope this gets solved soon.

Ooops! This is a rather BIG bug from a rigger/character artist stand point! A good armature weight painting needs to be done with subdivisions enabled to carefully see the deformation of the mesh, I hope this gets solved soon.

Sergey Sharybin was assigned by Sebastian Parborg

2019-08-12 13:49:38 +02:00

zebus3d commented

2019-08-26 13:47:28 +02:00

Added subscriber: @zebus3dream

blender-admin commented

2019-09-11 11:14:06 +02:00

This issue was referenced by 5e332fd700

This issue was referenced by 5e332fd700fbddfbc4c7e543daa1d852809ad1c1

Sergey Sharybin commented

2019-09-19 12:02:26 +02:00

Changed status from 'Open' to: 'Resolved'

Sergey Sharybin closed this issue

2019-09-19 12:02:26 +02:00

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Subdivision modifier and multirres modifier broke for weight paint, vertex paint and sculpt #67934