Messy Shading of Multiple-Faced Flat Surfaces in Workbench Matcap Rendered View #60693

New Issue

Tarun Nalluri · 2019-01-21T04:19:35+01:00

Tarun Nalluri commented

2019-01-21 04:19:35 +01:00

System Information
Operating system: Windows 10 64-bit
Graphics card: Nvidia GTX 970

Blender Version
Broken: 2.80, b0dee09a6d, blender2.7, 2019-01-19 20:58

Short description of error
Workbench Matcap Rendered View generates strange shading artifacts when rendering a flat mesh with flat faces that have identical normals. This happens even after recalculating normals, and happens with both flat shading and smooth shading selected. Example Blend File and screenshots included. Workbench Shading Artfiacts.zip

Exact steps for others to reproduce the error
Steps from Default Startup:

Delete default cube
Add Mesh -> Circle
Change Circle Vertices from 32 to 8
Change to Edit Mode
Select all vertices and create a face by pressing F
Select ring vertices
Extrude and Scale along global X and Y axes, either outward or inward, and press enter
Change Render Engine to Workbench
Lighting -> MatCap
Enter Rendered View in the Viewport

**System Information** Operating system: Windows 10 64-bit Graphics card: Nvidia GTX 970 **Blender Version** Broken: 2.80, b0dee09a6d55, blender2.7, 2019-01-19 20:58 **Short description of error** Workbench Matcap Rendered View generates strange shading artifacts when rendering a flat mesh with flat faces that have identical normals. This happens even after recalculating normals, and happens with both flat shading and smooth shading selected. Example Blend File and screenshots included. [Workbench Shading Artfiacts.zip](https://archive.blender.org/developer/F6351982/Workbench_Shading_Artfiacts.zip) **Exact steps for others to reproduce the error** Steps from Default Startup: 1) Delete default cube 2) Add Mesh -> Circle 3) Change Circle Vertices from 32 to 8 4) Change to Edit Mode 5) Select all vertices and create a face by pressing F 5) Select ring vertices 6) Extrude and Scale along global X and Y axes, either outward or inward, and press enter 7) Change Render Engine to Workbench 8) Lighting -> MatCap 9) Enter Rendered View in the Viewport

Tarun Nalluri commented

2019-01-21 04:19:35 +01:00

Added subscriber: @cpltarun

Tarun Nalluri commented

2019-01-21 05:13:42 +01:00

Sincerest apologies for my ignorance. I did not realize that by extruding a face and scaling outwards, I was creating an extra face that covers the diameter of the entire mesh. By deleting that extra face, the shading error disappears.

Brecht Van Lommel commented

2019-03-20 22:29:51 +01:00

Added subscriber: @brecht

Brecht Van Lommel commented

2019-03-20 22:29:51 +01:00

Changed status from 'Open' to: 'Archived'

Brecht Van Lommel closed this issue

2019-03-20 22:29:51 +01:00

Brecht Van Lommel self-assigned this 2019-03-20 22:29:51 +01:00

Brecht Van Lommel commented

2019-03-20 22:29:52 +01:00

Artifacts from overlapping faces are not currently considered a bug.

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Messy Shading of Multiple-Faced Flat Surfaces in Workbench Matcap Rendered View #60693