@libellule
I can't say what enviroments look the best to me, since one or the other has some tracks that look better. While Forza 3 wins in the suzuka track, I still haven't seen a city track on Forza 3 that looks on par to what the London track accomplished on GT5:P
Also, while Forza 3 has a super Nurburgring track, it has a huge glitch in that some parts of the track the horizon is clipped and only shows a white rectangl. I took a picture of it, and will post it once i get a gold subscription.
The point is that, it depends on how you view each game and in what conditions. Most of the times, Forza 3 has superb enviroments, while GT5:p has the London track above all. We'll have to see and wait what GT5 will have to offer, but so far, that Tokyo R246 track enviroments looks on par to what Forza 3 enviroments have to offer.
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"
