Thank you for that.I still use CSP 1.77preview1 and Pure works fine. You only need the newer versions if you want to use 2D clouds I believe. Peter can correct me if i'm wrong.
I'll look into it later today, but i'm not sure why that would happen. I didn't touch anything related to the hiding of objects (except the 3D trees). Actually, I don't even recall seeing a bridge in my testing. Were you using the stock track or one of the F1 mods?
EDIT: Are you talking about the structure\bridge just past the tall building after you leave the pits? Other than that one, I don't see a bridge anywhere else on the track.
Regarding the Imola track modification could you post a comparative screenshots