Weight Painting affects hidden part of mesh #60126

New Issue

Casey Frost · 2019-01-03T18:11:54+01:00

Casey Frost commented

2019-01-03 18:11:54 +01:00

System Information
Operating system: Windows 10 Pro
Graphics card: GTX 1070

Blender Version
Broken: 2.80, 2019-01-01 15:44 Hash: 4dd0a90f42

Short description of error

If I hide a portion of my mesh, because I want to isolate a section for weight painting, the weight painting still impacts the hidden part{F6162411} of the mesh.

Exact steps for others to reproduce the error

Open blend file supplied, it should take you to a section of roof that's been manually painted.

Alt-H to verify the rest of the mesh is currently unweighted, once verified, hide again.

Go to any weight painting tool, gradient, brush, doesn't matter, and paint the roof with the rest of the mesh hidden however you like.

Once done, Alt-H to unhide the remainder of the mesh and you'll see it's been weighted.

**System Information** Operating system: Windows 10 Pro Graphics card: GTX 1070 **Blender Version** Broken: 2.80, 2019-01-01 15:44 Hash: 4dd0a90f4213 **Short description of error** If I hide a portion of my mesh, because I want to isolate a section for weight painting, the weight painting still impacts the hidden part{[F6162411](https://archive.blender.org/developer/F6162411/WeightPaintBug.zip)} of the mesh. **Exact steps for others to reproduce the error** Open blend file supplied, it should take you to a section of roof that's been manually painted. Alt-H to verify the rest of the mesh is currently unweighted, once verified, hide again. Go to any weight painting tool, gradient, brush, doesn't matter, and paint the roof with the rest of the mesh hidden however you like. Once done, Alt-H to unhide the remainder of the mesh and you'll see it's been weighted.

Casey Frost commented

2019-01-03 18:11:54 +01:00

Added subscriber: @HardRooster

Adam Dominec commented

2019-01-04 10:02:05 +01:00

Added subscriber: @emu-3

Adam Dominec commented

2019-01-04 10:02:05 +01:00

I opened the attached file in Blender df3e7d0361, Ubuntu Linux 4.13.0-25-generic.

I switched to Weight paint mode and used different brushes to see if they affect the hidden vertices (bug) or not (OK)

Draw: OK
Smooth: OK
Average: OK
Smear: OK
Sample Weight: bug
Sample Vertex Group: bug
Gradient: bug

I opened the attached file in Blender df3e7d0361, Ubuntu Linux 4.13.0-25-generic. I switched to Weight paint mode and used different brushes to see if they affect the hidden vertices (bug) or not (OK) - Draw: OK - Smooth: OK - Average: OK - Smear: OK - Sample Weight: bug - Sample Vertex Group: bug - Gradient: bug

Jacques Lucke commented

2019-01-22 12:58:27 +01:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2019-01-22 12:58:28 +01:00

Can you check if the bug still exists in the newest Blender build?
I can't seem to reproduce it.

Please provide a screenshot of how the weight paint on the part of the model looks, what should not have changed.

Can you check if the bug still exists in the newest Blender build? I can't seem to reproduce it. Please provide a screenshot of how the weight paint on the part of the model looks, what should not have changed.

Adam Dominec commented

2019-01-22 13:12:50 +01:00

As of 8beab3e339, gradient still applies to the whole mesh. I think it is a bug, hidden geometry should not be affected at all.

All the remaining brushes now work correctly.

As of 8beab3e339, gradient still applies to the whole mesh. I think it is a bug, hidden geometry should not be affected at all. All the remaining brushes now work correctly.

Jacques Lucke commented

2019-01-22 13:26:45 +01:00

Can confirm, the gradient tool still has this bug.

Philipp Oeser commented

2019-01-22 13:43:12 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2019-01-22 13:43:12 +01:00

Note that 2.79 actually displayed the whole mesh in texture, vertex, weight paint modes (regardless of hidden geometry), and only editmode respected hidden stuff.
Not sure if this is by design (but this might be the reason that hidden stuff is not respected in some tools)

Note that 2.79 actually displayed the whole mesh in `texture`, `vertex`, `weight` paint modes (regardless of hidden geometry), and only editmode respected hidden stuff. Not sure if this is by design (but this might be the reason that hidden stuff is not respected in some tools)

Philipp Oeser commented

2019-01-22 13:50:38 +01:00

Note that 2.79 actually displayed the whole mesh in texture, vertex, weight paint modes (regardless of hidden geometry), and only editmode respected hidden stuff.

... unless you had face/vert selection masking enabled...

> Note that 2.79 actually displayed the whole mesh in texture, vertex, weight paint modes (regardless of hidden geometry), and only editmode respected hidden stuff. ... unless you had face/vert selection masking enabled...

Philipp Oeser commented

2019-01-22 13:53:14 +01:00

and 2.79 respected hidden stuff while painting (even though it displayed all)... except for the gradient tool, so this bug is in 2.79 as well...
So sorry for the noise (was just some findings...)

and 2.79 respected hidden stuff while painting (even though it displayed all)... except for the gradient tool, so this bug is in 2.79 as well... So sorry for the noise (was just some findings...)

Jacques Lucke commented

2019-01-22 14:08:03 +01:00

I'm trying to fix this right now, however there seems to be one additional issue, need some more time.