Incorrect Face orientation in Screw modifier. #82215

New Issue

Rajendra Meena · 2020-10-29T10:50:42+01:00

Rajendra Meena commented

2020-10-29 10:50:42 +01:00

System Information
Operating system: Windows-10-10.0.16299-SP0 64 Bits
Graphics card: GeForce MX150/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.30

Blender Version
Broken: version: 2.90.0, branch: master, commit date: 2020-08-31 11:26, hash: 0330d1af29
Worked: (newest version of Blender that worked as expected)

Short description of error
The bevel operation (Vertex) flip the face orientation/Normal.

Exact steps for others to reproduce the error

Add a single vertex.
Apply screw modifier (For bottle making)
Goto edit mode and make some extrusion of vertex in upward direction.
Now select any middle vertex and press "Ctrl+Shift+B" to bevel it. (Problem starts here)
Enable face orientation from overlays and you will see the beveled vertices will show incorrect face orientation.

I know i can apply the screw modifier and correct it but it will ruin the Non-destructive approach.

My suggestions:
Just like blender implemented weld modifier even there is an option for merge vertices, a similar type of modifier can be implemented for correcting normals. 3ds max already have "smooth" modifiers to tackle such situation.

untitled.blend

**System Information** Operating system: Windows-10-10.0.16299-SP0 64 Bits Graphics card: GeForce MX150/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.30 **Blender Version** Broken: version: 2.90.0, branch: master, commit date: 2020-08-31 11:26, hash: `0330d1af29` Worked: (newest version of Blender that worked as expected) **Short description of error** The bevel operation (Vertex) flip the face orientation/Normal. **Exact steps for others to reproduce the error** 1. Add a single vertex. 2. Apply screw modifier (For bottle making) 3. Goto edit mode and make some extrusion of vertex in upward direction. 4. Now select any middle vertex and press "Ctrl+Shift+B" to bevel it. (Problem starts here) 5. Enable face orientation from overlays and you will see the beveled vertices will show incorrect face orientation. I know i can apply the screw modifier and correct it but it will ruin the Non-destructive approach. My suggestions: Just like blender implemented weld modifier even there is an option for merge vertices, a similar type of modifier can be implemented for correcting normals. 3ds max already have "smooth" modifiers to tackle such situation. [untitled.blend](https://archive.blender.org/developer/F9122260/untitled.blend)

Rajendra Meena commented

2020-10-29 10:50:42 +01:00

Added subscriber: @rajq123