Hi Alan,
I understand that concept with the line styles and that it converts in worst case one line segment into thousands of tiny little ones. But that's more of an issue if you zoom out.
But zooming out is smooth and without any delay on my machine. I have the issue with zooming in to about 30 cm and just a few lines left on the screen.
I have enabled the show as solid and even set my lines to solid and no text visible.
I've got a mid size road model with given triangles for the subgrade quantities I have to cleanup, so I'm zooming in and out and rotate a lot in 3D view. And usually with the last mouse wheel click it starts to rebuild in plan or 3D view with just a few lines left on the screen. I don't think it's line style related.
I've got 16 GB out of 32 of RAM left, so once it has rebuilt something it could just keep it in memory all the time and not forget it within a few seconds. And looking at the Quadro graphics RAM and the main RAM, they don't seem to change during the rebuilt. So what is it actually doing?
I have the feeling it's getting worse the larger the file gets. With all the surfaces and Cut/Fill maps the file is meanwhile at 400 MB.
TBC 5.30