Baseline (Widescreen) Solution & Issues
All two-dimensional screens are stretched in widescreen resolutions.
The car movies on the select team screens are stretched in widescreen resolutions.
The rendered cars on the two-dimensional screens do not stretch in widescreen resolutions.
The monitor preview is Hor + in widescreen resolutions.
The HUD and all two-dimensional elements are stretched in widescreen resolutions.
The virtual mirror is Hor + in widescreen resolutions.
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
Eyefinity / Surround Specific Solution & Issues
Some minor UI elements are much bigger than intended (e.g. progress bar on loading screens) but this does not affect playability.
To reduce extreme stretching at the outer edges and get a realistic sense of speed in multi-monitor layouts, the game allows in-car on-the-fly FOV changes.
This is however an undocumented feature. To use: hold left CTRL and LMB and move mouse forward/backwards for FOV decrease/increase.
4k UHD Specific Solution & Issues