when i use Testmetal to activate open gl, the mesh gets more manageable. basically when you zoom out to view the entire mesh and start rotating the viewport in perspective it becomes pretty sluggish, and this on an m1 ultra.
info.txt (4.8 KB) since the zipped model has 130 mb i upload it via wetransfer
I don’t know if there has been work on optimizing performance for cases you give. I am just reporting what I am seeing.
Rhino 8.2 is available as Service Release Candidate, but I see you are on 8.1 with an evaluation license. I don’t know if that has the capability to update to service release candidates.