Multires spikes when pressing Subdivide #59758

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opened 2018-12-22 12:31:45 +01:00 by PatrickHaque · 13 comments

Blender 2.8 Beta Bug

I Bug aprea when I increas the edges, sculpt in the first MultiRes Layer and after the third
I produce some artefacts.

Knight.blend1

MultiresolutionEdgeIncrease.PNG

Knight.blend

Blender 2.8 Beta Bug I Bug aprea when I increas the edges, sculpt in the first MultiRes Layer and after the third I produce some artefacts. [Knight.blend1](https://archive.blender.org/developer/F6034254/Knight.blend1) ![MultiresolutionEdgeIncrease.PNG](https://archive.blender.org/developer/F6034253/MultiresolutionEdgeIncrease.PNG) [Knight.blend](https://archive.blender.org/developer/F6034252/Knight.blend)
Author

Added subscriber: @PatrickHaque

Added subscriber: @PatrickHaque

#70983 was marked as duplicate of this issue

#70983 was marked as duplicate of this issue
Sergey Sharybin was assigned by Brecht Van Lommel 2019-01-09 19:10:02 +01:00
Brecht Van Lommel changed title from BugReport - Sculpting Multiresolution - Edgeincrease to Multires spikes when pressing Subdivide 2019-01-09 19:10:19 +01:00

For some reason only happens in sculpt mode. Subdividing in object mode seems to work fine.

For some reason only happens in sculpt mode. Subdividing in object mode seems to work fine.

Added subscriber: @hirvijk

Added subscriber: @hirvijk

Hey, it happened to me also, when I investigate it further, I think it triggers when you try to subdivide a model that has vertices which connected with more than 4 edges.

Hey, it happened to me also, when I investigate it further, I think it triggers when you try to subdivide a model that has vertices which connected with more than 4 edges.

Added subscriber: @siebeneicher

Added subscriber: @siebeneicher

Similar problems here.
Here is a terrain model.
Multires_Bug.blend

If you do multires subdivision, spikes occour. Seems to be independent from Object mode / Sculpt mode. After subdivision step, poles turn to something like this.

Spike_on_poles.png

Spikes only occour on vertex poles.

After subdivision step, some loops on poles show artifacts, too.

Similar problems here. Here is a terrain model. [Multires_Bug.blend](https://archive.blender.org/developer/F7020459/Multires_Bug.blend) If you do multires subdivision, spikes occour. Seems to be independent from Object mode / Sculpt mode. After subdivision step, poles turn to something like this. ![Spike_on_poles.png](https://archive.blender.org/developer/F7020440/Spike_on_poles.png) Spikes only occour on vertex poles. After subdivision step, some loops on poles show artifacts, too.

There is something curious.
Try erase all multires subdiv stages. Now, you can do fresh multires/subdivisions without any artifact.

Do Artifacts on landscape mesh occour, if subdivide is applied to an edited multires stage?

The 'knight.blend1' example file seems to change its multires/subdiv behaviour too. If I sculpt on a pole area on the hips, supdivisions turns whole model into a confetti which swallows whole figure.

Workaround seems to do all subdivision steps in Object mode on the beginning of the sculpting session, before doing anything in sculpting mode. Playing with it atm, but I cant say much more this moment.

Happy blending.

There is something curious. Try erase all multires subdiv stages. Now, you can do fresh multires/subdivisions without any artifact. Do Artifacts on landscape mesh occour, if subdivide is applied to an edited multires stage? The 'knight.blend1' example file seems to change its multires/subdiv behaviour too. If I sculpt on a pole area on the hips, supdivisions turns whole model into a confetti which swallows whole figure. Workaround seems to do all subdivision steps in Object mode on the beginning of the sculpting session, before doing anything in sculpting mode. Playing with it atm, but I cant say much more this moment. Happy blending.

Added subscriber: @AlRedd-3

Added subscriber: @AlRedd-3

Hello, any news on this yet?

Hello, any news on this yet?

Hi AIRedd

Looks like this bug is still there, in Blender 2.80rc1.

I uploaded a more minimal file.

Only some multires subdivision needed to show problem.

SpikingPoles.blend

Hi AIRedd Looks like this bug is still there, in Blender 2.80rc1. I uploaded a more minimal file. Only some multires subdivision needed to show problem. [SpikingPoles.blend](https://archive.blender.org/developer/F7613151/SpikingPoles.blend)

Added subscribers: @MassimilianoPuliero, @ErickNyanduKabongo, @lichtwerk, @Sergey, @PabloDobarro, @Stan_Pancakes

Added subscribers: @MassimilianoPuliero, @ErickNyanduKabongo, @lichtwerk, @Sergey, @PabloDobarro, @Stan_Pancakes
Sergey Sharybin was unassigned by Dalai Felinto 2019-12-23 16:35:33 +01:00
Member

Closed as duplicate of studio/blender-studio#58473

Closed as duplicate of studio/blender-studio#58473
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Reference: blender/blender#59758
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