Turn10? What do Turn10 have to do with this?
I don't have an XBOX but I presume that 'Enhanced Frame Rate' will sacrifice some detail to ensure a solid 60fps? As such, I guess things like car models and track detail are reduced to ensure 60fps in all conditions. Presumably it doesn't look like this in the other modes then, just to rule out a bug with the car model?
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Car looked same in Leipzig track on enhanced frame rate and enhanced visual too