I do think there is a problem with solid element operations. I am working on a large site model, with a site mesh and lots of roads, paths, site stairs (made out of slabs), etc. The model is 5.5 mb. I am continually having to undo/ redo the solid element operations to get things to show up properly.
Sometimes the entire site mesh disappears from 3D view after I make some minor change to the model, such as modifying a slab that I have previously used to subtract from the mesh.
Sometimes some (but not all) of the roads that follow the mesh, which I have subtracted from the mesh to make them visible, stop being subtracted.
Sometimes the mesh covers slabs that I have previously made visible using "subtract with upwards extrusion". The slabs on the north end of the model may remain visible, while the slabs on the south end disappear under the mesh.
I have re-done the solid element operations so many times that I have created special layers so that I can do them over again quickly. I have one layer for slabs that need to slope with the mesh (about 25 elements of these), another layer for flat slabs such as stairs that will be subtracted from the mesh (about 120 elements).
Sometimes it works, sometimes it doesn't. When it doesn't work I change some of the slabs, removing curved edges and replacing with straight line segments, breaking up slabs with holes into multiple sections with out holes, etc. and finally it renders correctly again. But I am wasting a lot of time doing this.
I split the mesh into two meshes so that each would be smaller. No improvement.
I do have other "virgin" copies of the mesh in turned-off layers (i.e.no solid element ops). Can these hurt?
Any other ideas for improving this behavior?
R Muller
AC 26 USA (20+ years on ArchiCAD)
MBP 64GB Apple M1 Max OS 12.1 Monterey