Operating system: Windows 10
Graphics card: GeForce GTX 1050 TI
Short description of error
When a single subdivision surface modifier with 1 subdivision is placed on an object with a high edge-count vertex, it all but stops working.
Exact steps for others to reproduce the error
- Open default startup and delete everything.
- Add a cylinder with 128 vertices and a triangle fan cap (even worse with n-gon).
- Add a subdivision surface modifier with 1 subdivision.
- Go into edit mode.
- Listen to your fan scream.
How it's different from the aforementioned bug:
The face count for this cylinder is only 384, as compared to 500 faces of the monkey mesh, but adding the same simple modifier to the monkey has no issue. The primary difference I can see is that the cylinder has vertices with a high edge count.
If you follow the same steps in Blender 2.79b, the problem does not occur, which leads me to believe there are some wrinkles in the Catmull-Clark implementation for 2.8 that need to be ironed out.