Some questions after import geometry
Hello, I imported the geometry, but I can't extrude to 3d mesh, it doesn't work, what's problem about it?
By the way, how can I set bounday layer in this case?
The geometry is attached. Thanks a lot.
https://drive.google.com/file/d/15iwqGIWJJdzLlXjmUWbptqVNdR4mY9Nj/view?usp=drive_link
Edited by jian