How is your model coming along Andrew?

Thanks Doppel, I uninstalled VRay and it immediately began running at a normal speed again. The issue was occurring for all file sizes, even upon starting a new file without any materials or parameters at all.

Thanks again!

Andrew

Thank you Pilou! That is a great idea, I'm going to try that right now. I actually have that plug in already, can't believe I didn't think of that.

There is no help for that.
Best way is to redraw the face. Somehow it got corrupted.
Sketchup sometimes, works in mysterious ways.