It's a GP4 bug which happens with many different mods/cars/tracks (usually as a combination of long cars and low sunlight angles) and there's no known fix.
If it bothers you, you can always switch to static shadows.
My unfinished tracks: [
www.grandprixgames.org]
Send bug reports and track editing questions to
f1virtualblog@gmail.comEdited 1 time(s). Last edit at 11/23/2022 12:44PM by Prblanco.