mask visibility in sculpt mode using shape keys or generative modifiers #67303

New Issue

Daniele Viagi · 2019-07-20T10:52:15+02:00

Daniele Viagi commented

2019-07-20 10:52:15 +02:00

System Information
Operating system: Windows 10
Graphics card: nvidia 1060 Ti

Blender Version
2.8 RC2

Short description of error
If you have a mesh with a mask and create a shape key, the mask will be no longer visible, still active but not visible.

Exact steps for others to reproduce the error

Add UV Sphere
Sculpt mode
Paint a mask
Create shape keys

Or from the default startup:

in sculptmode, Mask > Invert Mask (default cube should turn dark)
strokes dont have an effect now (this is expected)
add any generative modifier to the default cube (e.g. triangulate)
back in objectmode, save the file
reload the file
enter sculptmode
no mask is visible
strokes dont have an effect now (this is confusing since you are not aware masks prevent an effect since you dont even see the masks)

(note we have the option Use Deform Only in sculptmode which might be exactly for that purpose, still not being able to use masks with generative modifiers should be more clear)

**System Information** Operating system: Windows 10 Graphics card: nvidia 1060 Ti **Blender Version** 2.8 RC2 **Short description of error** If you have a mesh with a mask and create a shape key, the mask will be no longer visible, still active but not visible. **Exact steps for others to reproduce the error** - Add UV Sphere - Sculpt mode - Paint a mask - Create shape keys Or from the default startup: - in sculptmode, `Mask` > `Invert Mask` (default cube should turn dark) - strokes dont have an effect now (this is expected) - add **any** generative modifier to the default cube (e.g. triangulate) - back in objectmode, save the file - reload the file - enter sculptmode - no mask is visible - strokes dont have an effect now (this is confusing since you are not aware masks prevent an effect since you dont even see the masks) (note we have the option `Use Deform Only` in sculptmode which might be exactly for that purpose, still not being able to use masks with generative modifiers should be more clear)

Daniele Viagi commented

2019-07-20 10:52:15 +02:00

Added subscriber: @DanieleViagi

blender-admin commented

2019-07-20 10:52:15 +02:00

#68287 was marked as duplicate of this issue

ronan ducluzeau commented

2019-07-20 17:06:48 +02:00

Added subscriber: @zeauro

ronan ducluzeau commented

2019-07-20 17:06:48 +02:00

I confirm. That is probably an issue that would have same solution as #67305.

Daniele Viagi commented

2019-07-21 09:42:53 +02:00

It's probably the same problem /solution https://developer.blender.org/T65850

Germano Cavalcante commented

2019-07-22 16:06:34 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2019-07-22 16:06:34 +02:00

Investigating...

Jeroen Bakker was assigned by Germano Cavalcante

2019-07-22 16:36:26 +02:00

Germano Cavalcante commented

2019-07-22 16:36:26 +02:00

Added subscriber: @Jeroen-Bakker

Germano Cavalcante commented

2019-07-22 16:36:26 +02:00

The sculpt masks drawing became more restricted after the commit d0fb602e2c.
@Jeroen-Bakker, can we take away the restriction in this case?

The sculpt masks drawing became more restricted after the commit d0fb602e2c. @Jeroen-Bakker, can we take away the restriction in this case?

Germano Cavalcante commented

2019-08-06 14:00:53 +02:00

Added subscriber: @ogier

Stef commented

2019-09-07 00:37:34 +02:00

Added subscriber: @stoofnie

Stef commented

2019-09-07 00:46:02 +02:00

Removed subscriber: @stoofnie

Stef commented

2019-09-07 00:46:22 +02:00

Added subscriber: @stoofnie

Maxximo Ramirez commented

2019-09-27 02:45:45 +02:00

Added subscriber: @maxximoramirez

Maxximo Ramirez commented

2019-09-27 02:45:45 +02:00

status of this issue?, until this day v2.81 Alpha Hash: ee47075449 still have this issue present.

status of this issue?, until this day v2.81 Alpha Hash: ee4707544904 still have this issue present.

Jeroen Bakker commented

2019-09-30 16:56:02 +02:00

@maxximoramirez I have dozens of issues on my desk with all the same priority. I haven't looked at this issue at all.

It will help if someone can create a good report for this, including a simple example file.

Thanks!

@maxximoramirez I have dozens of issues on my desk with all the same priority. I haven't looked at this issue at all. It will help if someone can create a good report for this, including a simple example file. Thanks!

Maxximo Ramirez commented

2019-10-05 16:31:18 +02:00

masks_issue_example.blend

@Jeroen-Bakker

I covered the 4 basic issues with visible masking, of course keep adding modifiers will keep the issue (such as bools or corrective smoothness)

Basically having a model with either a ShapeKey (Basis included) or a modifier that affects his shape (such as Armature or basic Smooth) will hide the mask until its removed.

[masks_issue_example.blend](https://archive.blender.org/developer/F7791081/masks_issue_example.blend) @Jeroen-Bakker I covered the 4 basic issues with visible masking, of course keep adding modifiers will keep the issue (such as bools or corrective smoothness) Basically having a model with either a ShapeKey (Basis included) or a modifier that affects his shape (such as Armature or basic Smooth) will hide the mask until its removed.

Julien Kaspar commented

2019-10-09 14:37:51 +02:00

Added subscriber: @JulienKaspar

Julien Kaspar commented

2019-10-09 14:37:51 +02:00

Since #70564 got implemented it works much better. But there's still some inconsistency. Here's a list of modifier-shapekey cases where the mask disappears or behaves differently.

Let's start with the masking and hiding geometry in sculpt mode:

Bevel/Triangulate =

The mask is strangely intersecting with the newly created geometry.
Hidden faces reappear but edges are still visible.

Remesh =

The mask is strangely intersecting with the newly created geometry.
Hidden geometry reappears.

Decimate =

The mask is strangely intersecting with the newly created geometry.
Hidden geometry stays hidden.

Multires =

The Mask stays.
Hidden geometry appears on higher subdiv levels.

Screw/Subdiv/Wireframe =

The mask disappears.
Hidden faces stay hidden but edges become visible again.

Skin =

The mask disappears.
Hidden geometry reappears.

When adding shapekeys there are these cases:

Multiresolution =

The mask disappears on the base resolution.

In all the other modifiers it seems that the shapekey is taken into account and the behaviour is as intended or like mentioned above.

Also some strange cases when "Use Deform Only" is enabled in the Sculpt Mode options:

Subdivision Surface =

The Mask disappears.

Cast/Curve/Simple Deform/Shrinkwrap/Smooth/Wave =

Still being applied in Sculpt Mode.

IMO modifiers that drastically alter the mesh like remesh and decimate should probably still hide the mask. Other modfiers that just move the geometry like Simple Deform, Mirror & Shrinkwrap are still very useful when using the mask in Sculpt Mode.
Hiding geometry can be useful in most of them.
The mask disappearing with the subdiv and multires modfiers is not ideal. At least for Subdiv it's ok though when not using "Use Deform Only".

I did not test the performance on any of these cases but when using modifiers for Sculpt Mode, users should expect a slower viewport anyway. That's what the "Use Deform Only" option is for after all. To speed up the performance by disabling all the modifiers.

Since #70564 got implemented it works much better. But there's still some inconsistency. Here's a list of modifier-shapekey cases where the mask disappears or behaves differently. **Let's start with the masking and hiding geometry in sculpt mode:** - Bevel/Triangulate = The mask is strangely intersecting with the newly created geometry. Hidden faces reappear but edges are still visible. - Remesh = The mask is strangely intersecting with the newly created geometry. Hidden geometry reappears. - Decimate = The mask is strangely intersecting with the newly created geometry. Hidden geometry stays hidden. - Multires = The Mask stays. Hidden geometry appears on higher subdiv levels. - Screw/Subdiv/Wireframe = The mask disappears. Hidden faces stay hidden but edges become visible again. - Skin = The mask disappears. Hidden geometry reappears. **When adding shapekeys there are these cases:** - Multiresolution = The mask disappears on the base resolution. In all the other modifiers it seems that the shapekey is taken into account and the behaviour is as intended or like mentioned above. **Also some strange cases when "Use Deform Only" is enabled in the Sculpt Mode options:** - Subdivision Surface = The Mask disappears. - Cast/Curve/Simple Deform/Shrinkwrap/Smooth/Wave = Still being applied in Sculpt Mode. --- IMO modifiers that drastically alter the mesh like remesh and decimate should probably still hide the mask. Other modfiers that just move the geometry like Simple Deform, Mirror & Shrinkwrap are still very useful when using the mask in Sculpt Mode. Hiding geometry can be useful in most of them. The mask disappearing with the subdiv and multires modfiers is not ideal. At least for Subdiv it's ok though when not using "Use Deform Only". I did not test the performance on any of these cases but when using modifiers for Sculpt Mode, users should expect a slower viewport anyway. That's what the "Use Deform Only" option is for after all. To speed up the performance by disabling all the modifiers.

Maxximo Ramirez commented

2019-10-09 14:52:14 +02:00

Using my example file it shows that with armatures it creates artifacts when sculpting over a mask, they looks like that its a mask-less duplicated of the model or a delayed version, progressing and using Undo seems to clean it and removing all the artifacts.
BUT when having shapekeys the error is less probable to appear (cant explain why atm)
To my knowledge:

SCULPT=clean
ARMT+SCULPT = artifacts
SK+SCULPT = clean
ARMT+SK+SCULPT = clean (sometimes artifacts)

Also the artifacts seems to be stronger when smooth shading its enable, using flat smooth reduce the artifacts to a minimum and when moving the camera with the mouse or doing another action seems to remove them at once.
Gonna build a better model example to check this but it falls mostly on viewport error and shouldn't affect using masks for the final result.

![image.png](https://archive.blender.org/developer/F7798778/image.png) Using my example file it shows that with armatures it creates artifacts when sculpting over a mask, they looks like that its a mask-less duplicated of the model or a delayed version, progressing and using Undo seems to clean it and removing all the artifacts. BUT when having shapekeys the error is less probable to appear (cant explain why atm) To my knowledge: SCULPT=clean ARMT+SCULPT = artifacts SK+SCULPT = clean ARMT+SK+SCULPT = clean (sometimes artifacts) Also the artifacts seems to be stronger when smooth shading its enable, using flat smooth reduce the artifacts to a minimum and when moving the camera with the mouse or doing another action seems to remove them at once. Gonna build a better model example to check this but it falls mostly on viewport error and shouldn't affect using masks for the final result.

Philipp Oeser commented

2019-10-15 13:29:45 +02:00

Added subscribers: @brecht, @lichtwerk

Philipp Oeser commented

2019-10-15 13:29:45 +02:00

Will CC @brecht here (since he took care of #70564...)

Jeroen Bakker removed their assignment 2019-12-18 14:02:27 +01:00

Pablo Dobarro was assigned by Jeroen Bakker

2019-12-18 14:02:27 +01:00

Pablo Dobarro was unassigned by Dalai Felinto

2019-12-23 16:33:40 +01:00

Dalai Felinto commented

2019-12-23 16:33:40 +01:00

Added subscriber: @PabloDobarro

Jeroen Bakker commented

2020-01-13 13:05:58 +01:00

Sculptmasks are optimized for sculpt drawing. When using specific modifiers the optimized sculpt drawing cannot be used anymore and the mask will not be able to render.

This issue also raises functional questions. When drawing a mask on top of a subsurface modifier would not draw the mask in the way how functionality would behave. Hence I set this to a known issue.

Sculptmasks are optimized for sculpt drawing. When using specific modifiers the optimized sculpt drawing cannot be used anymore and the mask will not be able to render. This issue also raises functional questions. When drawing a mask on top of a subsurface modifier would not draw the mask in the way how functionality would behave. Hence I set this to a known issue.

Pauan commented

2021-11-21 15:47:30 +01:00

Added subscriber: @pauanyu_blender

Philipp Oeser removed the

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mask visibility in sculpt mode using shape keys or generative modifiers #67303