That’s what I’ve been trying to say all-along. In any view aside from the first person views, the game has camera artefact effects, as it should because it’s through a camera. You can see lens flair, dirt and particles on the lens itself and probably over-exposure of the tail lights which most cameras do.
** Fair enough - but I would have preferred to see colors in the game, especially tail lights, the way the human eye sees them, as opposed to a camera lens. Camera lens do overexpose tail light color and makes them appear pink, orange, yellow - all kinds of funny shades. No stranger to that.
Yes Forza does need to tweak its lighting model slightly, though the game still looks good enough imo. There needs to be more of a sparkle effect instead of a bloom and glow effect on paint in particular and on lights and there needs to be a general reduction in bloom and exposure but these are small tweaks.
** Oh I never knocked on the game once - I love the ‘dramatic’ look of the game, makes it very immersive and enjoyable to play. I do agree that the paint sparkle effect has taken a hit; it was far more convincing in FM6 and 5. The bloom can be over the top during the day, but ironically, the headlights and tail lights never appear to have the right level of bloom and glow at night - in fact, they look brighter during the day. Odd design choice - or perhaps an after effect of the compromises they made to keep the action at 60fps locked. I still wish they had spent more time tweaking the bloom and exposure for both day and night. Again, it looks really good in FM6, at least to my naked eye.
Comparing Forza Motorsport 5 and 6 to 7 isn’t fair. They’re all pre-rendered, pre-baked, not dynmaic weather systems or no weather systems at all. Of course they’re going to look better on current hardware. When you introduce weather systems and effects such as dynamic reflections, shadows, lighting, saturation, contrast, skybox, sun, clouds, rain and so on so forth, something needs to take a hit and unfortunately that’s slight hits to graphical fidelity.
** Fair enough - no further comment! 
Now on the next hardware, there’s one of two scenarios:
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The game will become even more dynamic with probably a 24 hour day to night and back to day cycle, with more weather types, effects and more conditions in general with minor improvements to graphical fidelity.
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The game stays with its current level of dynamic options but the graphics improve considerably.
Personally, I would prefer option one and with how the franchise has progressed since Forza Motorsport 5, that’s probably the option they’ll choose and I personally think it’s the correct option because the graphics are good enough already and aren’t as important as content, features or physics.
** I wouldn’t mind either option TBH, although opt. one seems sweeter! I would, however, want them to focus much, much more on car sound character and nuanced physics modeling for each car. It’s going to be tough - sure - but is it impossible? Not by any means, not with their budget.