Sculpting is extremely slow when a Modifier is present with a driver added #120200

New Issue

Chris Jones · 2024-04-03T10:45:22+02:00

Chris Jones commented

2024-04-03 10:45:22 +02:00

System Information
Operating system: Windows-10-10.0.22631-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 4090/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 551.86

Blender Version
Broken: version: 4.1.0, branch: blender-v4.1-release, commit date: 2024-03-25 20:42, hash: 40a5e739e270
Worked: 4.0.2

Caused by 7a2d04a5c4

Short description of error
Sculpting is slow when the object being sculpted on contains a Modifier, and a driver is present on one of its values. This occurs even when the modifier is not displayed in the viewport. The example file contains a Multires modifier to increase subdivisions, but the result is the same for high poly objects without Multires. The issue persists in 4.2.0 Alpha.

Exact steps for others to reproduce the error

Load the attached "Slow Sculpt.blend" file
Add 5 or 6 Multires subdivisions
Sculpt on the cube and note the poor performance
Remove the driver from the Warp modifier's falloff Radius value
Sculpt again, and notice the drastic performance increase

**System Information** Operating system: Windows-10-10.0.22631-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 4090/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 551.86 **Blender Version** Broken: version: 4.1.0, branch: blender-v4.1-release, commit date: 2024-03-25 20:42, hash: `40a5e739e270` Worked: 4.0.2 Caused by 7a2d04a5c4 **Short description of error** Sculpting is slow when the object being sculpted on contains a Modifier, and a driver is present on one of its values. This occurs even when the modifier is not displayed in the viewport. The example file contains a Multires modifier to increase subdivisions, but the result is the same for high poly objects without Multires. The issue persists in 4.2.0 Alpha. **Exact steps for others to reproduce the error** 1. Load the attached "Slow Sculpt.blend" file 2. Add 5 or 6 Multires subdivisions 3. Sculpt on the cube and note the poor performance 4. Remove the driver from the Warp modifier's falloff Radius value 5. Sculpt again, and notice the drastic performance increase

Slow Sculpt.blend

1.4 MiB

Chris Jones added the

labels 2024-04-03 10:45:23 +02:00

Philipp Oeser commented

2024-04-03 11:11:06 +02:00