I have recently updated from Revit 2012 to 2013. I have updated drivers on my graphics card and Revit says there are no graphic related problems detected! However when I use the In place modeling tools shapes are jagged even cylindrical shapes!? Im using a 2012 template maybe thats the issue? can you help?
Try the following:
1. Using out of the box 2013 templates.
2. Turn off Hardware Acceleration (R > Options > Graphics > un-check all graphics boxes).
3. If you open an out of the box family to edit it what does it look like?
Thanks for posting.