System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 745/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 399.24
Blender Version
Broken: version: 2.80 (sub 74), branch: blender2.7, commit date: 2019-06-11 23:43, hash: rB6529d20d79a5
Worked: (optional)
Short description of error
Edge Slide slows to crawl with Subdivision surface modifier option: "Display Modifier in Edit view" on.
Exact steps for others to reproduce the error
NOTE: Perform the same steps with cylinders composed of 32, 64 and 128 verts.
- Shift+A to create a cylinder
- go into Edit mode.
- Ctrl+R to create 3 cuts. Press Enter to commit.
- add Subdivision surface modifier. Make sure that "Display modifier in Edit mode" option is ON.
- activate the Edge slide tool.
- select edge 2 and slide toward top edge of cylinder to create a holding edge.
- select edge 4 and move toward bottom edge.
- select edge 3 (center one) and move toward either edge 2 or 4.
As the number of verts in the loop increases, the loop being "slid" will become "stuck" to the loop being approach. When trying to "slide" away from the loop there is a noticeable lag behind any mouse movement.
Turn off the "Display modifier in Edit mode" option and loops move freely.