The Ferrari F50 is in desperate need of a full remake like the F40s and is simply to up outdated and unacceptable in “built from the ground up” AAA licensed racing game.
While the FM’s strange lighting, paint behavior, ans its exaggerated & monotonous RT makes all cars look bad - it’s the outdated models like the F50 with their poor proportions that look absolutely awful here.
You can find the linked post to FH5 discussing all the errors. Requesting T10 to fully rescan and redo this car for the near future. Thank you