Blender 2.8: Sculpting Tools Working Incosistently on MultiResolutioned Meshes #61961

New Issue

Avi · 2019-02-26T03:55:05+01:00

Avi commented

2019-02-26 03:55:05 +01:00

Blender Version
Broken:
2.80, 54ffc4e19d, blender2.8, 2019-02-25
Worked:
2.79b

Short description of error

When using Sculpt mode on a non-quad-based MultiResolutioned mesh, sculpting on a level other than level 0 results in deformed geometry that is not present in 2.79 or when sculpting the item with the MultiResolution modifier applied

Exact steps for others to reproduce the error

Enter the Default scene, and remove the Cube. Add a UVSphere, and add a MultiResolution modifier to the object. Add a subdivision level, and enter sculpt mode. Select the Smooth brush, run it over the object's surface, and observe the odd resultant topology. Edge loops are not maintained properly straight, as they were in 2.79.

This also shows up on an IcoSphere. Add one, and add a MultiResolution modifier to the object. Subdivide many times, enter sculpt mode, and use the smooth brush. You'll immediately see that the topology morphs in a very non-uniform way.

This does not reproduce on a Cube. I believe that this is because the tool works properly with a fully-quad-based mesh, or the Cube otherwise meets some assumption the code is making.

If you apply the MultiResolution modifier, and sculpt on the resultant subdivided geometry, you will see the intended behavior. Edge Loops and face area (relative to other affected faces) are maintained. This is the same behavior exhibited in 2.79 when sculpting WITH MultiResolution.

bugreportsculpt.blend

**Blender Version** Broken: 2.80, 54ffc4e19dc4, blender2.8, 2019-02-25 Worked: 2.79b **Short description of error** When using Sculpt mode on a non-quad-based MultiResolutioned mesh, sculpting on a level other than level 0 results in deformed geometry that is not present in 2.79 or when sculpting the item with the MultiResolution modifier applied **Exact steps for others to reproduce the error** Enter the Default scene, and remove the Cube. Add a UVSphere, and add a MultiResolution modifier to the object. Add a subdivision level, and enter sculpt mode. Select the Smooth brush, run it over the object's surface, and observe the odd resultant topology. Edge loops are not maintained properly straight, as they were in 2.79. This also shows up on an IcoSphere. Add one, and add a MultiResolution modifier to the object. Subdivide many times, enter sculpt mode, and use the smooth brush. You'll immediately see that the topology morphs in a very non-uniform way. This does not reproduce on a Cube. I believe that this is because the tool works properly with a fully-quad-based mesh, or the Cube otherwise meets some assumption the code is making. If you apply the MultiResolution modifier, and sculpt on the resultant subdivided geometry, you will see the intended behavior. Edge Loops and face area (relative to other affected faces) are maintained. This is the same behavior exhibited in 2.79 when sculpting WITH MultiResolution. [bugreportsculpt.blend](https://archive.blender.org/developer/F6714989/bugreportsculpt.blend)

Avi commented

2019-02-26 03:55:05 +01:00

Added subscriber: @AviTudios

Sergey Sharybin was assigned by Sebastian Parborg

2019-02-26 16:36:00 +01:00

blender-admin commented

2019-03-08 17:00:11 +01:00

This issue was referenced by bfebb494f6

This issue was referenced by bfebb494f634ce3b8c6c468bac72d2abc51af45b

Sergey Sharybin commented

2019-03-08 17:02:41 +01:00

Changed status from 'Open' to: 'Resolved'

Sergey Sharybin closed this issue

2019-03-08 17:02:41 +01:00

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Blender 2.8: Sculpting Tools Working Incosistently on MultiResolutioned Meshes #61961