Brush rotation doesn't update as frequent as Spacing #116736

New Issue

Julien Kaspar · 2024-01-03T10:54:06+01:00

Julien Kaspar commented

2024-01-03 10:54:06 +01:00

System Information
Operating system: Linux-6.6.7-gentoo-x86_64-AMD_Ryzen_Threadripper_1950X_16-Core_Processor-with-glibc2.37 64 Bits, X11 UI
Graphics card: AMD Radeon RX 7900 XT (radeonsi, navi31, LLVM 16.0.6, DRM 3.54, 6.6.7-gentoo) AMD 4.6 (Core Profile) Mesa 23.3.1

Blender Version
Broken: version: 4.1.0 Alpha, branch: main, commit date: 2024-01-03 00:09, hash: 29b1658124b8
Worked: (newest version of Blender that worked as expected)

Short description of error
Many brushes use the default Stroke Spacing value of 10%. The rotation of the brush tip and texture (if Rake is enabled in the texture mapping) seems to be hard coded to update with that spacing in mind.

If the Spacing value is lowered (commonly to increase the quality of the brush stroke),
the rotation of the texture and brush tip shape should also update more frequently.

In this video the Spacing of the Paint brush in sculpt mode was changed to 3%.
The "Tip Roundness" and "Tip Scale X" was also lowered to make the shape rotation more visible.
On a Spacing of 3% the square shape is applied roughly 3 times in the same rotation before updating the rotation again.

An interesting observation is that the "Clay Strips" brush is the only one that doesn't suffer from this issue.

Exact steps for others to reproduce the error

Open the attached .blend file
Subdivide the cube a few times for higher resolution and apply the modifier
Use the Draw or Paint brush in Sculpt Mode
Try out different Spacing values

**System Information** Operating system: Linux-6.6.7-gentoo-x86_64-AMD_Ryzen_Threadripper_1950X_16-Core_Processor-with-glibc2.37 64 Bits, X11 UI Graphics card: AMD Radeon RX 7900 XT (radeonsi, navi31, LLVM 16.0.6, DRM 3.54, 6.6.7-gentoo) AMD 4.6 (Core Profile) Mesa 23.3.1 **Blender Version** Broken: version: 4.1.0 Alpha, branch: main, commit date: 2024-01-03 00:09, hash: `29b1658124b8` Worked: (newest version of Blender that worked as expected) **Short description of error** Many brushes use the default Stroke Spacing value of 10%. The rotation of the brush tip and texture (if Rake is enabled in the texture mapping) seems to be hard coded to update with that spacing in mind. If the Spacing value is lowered (commonly to increase the quality of the brush stroke), the rotation of the texture and brush tip shape should also update more frequently. In this video the Spacing of the Paint brush in sculpt mode was changed to 3%. The "Tip Roundness" and "Tip Scale X" was also lowered to make the shape rotation more visible. On a Spacing of 3% the square shape is applied roughly 3 times in the same rotation before updating the rotation again. <video src="/attachments/9523b029-9073-4a44-bde2-21e6e540f192" title="2024-01-03 10-42-29.mp4" controls></video> An interesting observation is that the "Clay Strips" brush is the only one that doesn't suffer from this issue. **Exact steps for others to reproduce the error** - Open the attached .blend file - Subdivide the cube a few times for higher resolution and apply the modifier - Use the Draw or Paint brush in Sculpt Mode - Try out different Spacing values

texture_bug (2).blend

1.7 MiB

2024-01-03 10-42-29.mp4

1.2 MiB

Julien Kaspar added the

labels 2024-01-03 10:54:06 +01:00