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EdgeSplit at Split Angle: 0 doesn't split flat faces
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Description

System Information
Operating system: Windows 10 x64
Graphics card: Nvidia 980

Blender Version
Broken: 2018-11-29 15:57, 26d5a3625ed, blender2.8

Short description of error
EdgeSplit Modifier doesn't produce separate faces if Split Angle is set to 0 and the mesh (or part of) is a flat object.

For example: Create a grid object with subdivisions greater than 1 and add an EdgeSplit modifier with Split Angle set to 0. Splitting the mesh now to loose parts or working with a Smooth modifier shows that the modifier didn't produce the desired effect.

Event Timeline

Bastien Montagne (mont29) lowered the priority of this task from Needs Triage by Developer to Confirmed, Medium.

In fact, we need special handling for both limit cases (180° == no split by angle, and 0° == split on all edges).