Rendering uses a lot of system resources and works best when run on non-Citrix computers.
Upgrading project files consumes a lot of memory and can have an adverse effect on other users working on the same server. Upgrade project files on non-Citrix computers before opening these files in a Citrix environment.
Close other programs accessed via Citrix.
Set the following in Application Options:
Turn off the View Cube
Turn off options for Steering Wheel Text Visibility