by LoneWolfDon » Tue May 03, 2011 9:49 am
Graphic-glitch, but doesn't happen too often for me (it used to happen more often before I upgraded to a better graphics-card), but when it does happen it usually appeared for me when in the editor, or more often if I've used "Alt + Tab" while in RailWorks to get to my desktop, and then going back into RailWorks (which can cause other side-effects such as various missing scenery objects and such).
Other things to suggest of course, is to have your graphics-drivers up to date, a decent graphics-card and ample amount of RAM can help, if route-building, remember to save, "F2", your work often, as I think the longer you go without saving your edits, the more it eats-up your RAM and can lead to side-effects like those, or the dreaded SBHH error.
Depending on your hardware / graphic-card, perhaps playing around with some of the settings can yield good results, and adjusting some of RailWorks settings too.
If the glitches remain persistent, I also found that closing and relaunching RailWorks resolved the problem.