Without SS, i find the game isn't as clear visually. And without AA on, the distance is shimmer and jaggies and cause a strain to your eyes. I try to play without AA and with AA, I can't stand it without AA...no matter how nice the graphics look, in VR...AA is a must due to terrible depth perception. I can bump up SS to 1.5 without AA and it looks great but without AA, it's just hard to look at the distance. So i had to bump it down to 1.3 with AA set to 2x.
I had tried in so many ways/testings like crazy to try to get the best visual by turning off certain graphics settings or bump certain settings. I have exhausted all options and come to the conclusion that SS @1.3 is the best most optimal w/ AA at 2x. This is with 980ti 6700k 15 cars light rain and clear weather.
Am i satisfied with the visual? Not at all, i think VR need to be at least 720p for the visual to stand out for racing game. The screen door effect clearly hurt the visual and not being able to bump up the SS to at least 1.5 w/ AA on really sucks. I heard GTX1080 can't even do that.