A review
http://uk.ps3.ign.com/articles/799/799830p1.html
And some thoughts on the gfx from that review:
One area that Rainbow Six: Vegas on the PlayStation 3 does fall a little short on when compared to the other versions is with regards to visuals. It's a nice looking game to be sure, but the whole thing doesn't look quite as sharp as it could. Colors are a little duller and there isn't as much use of certain effects, like bloom lighting and such. Some folks may appreciate that aspect to a certain degree, but beyond that it still doesn't look quite as nice as what we've seen previously. Some texture work isn't quite as sharp, and the characters aren't as detailed as what's found in the 360 release, especially in the faces. Weapons that have been dropped pop in and out of view as you approach and walk away when they're but a mere 50 feet or so away.
Also, as we've mentioned in one of our last previews of the game, there's a weird issue when running the title in 1080i as everything, including the menus, look very blurry. It's pretty sharp when played at 720p, which leads us to believe that at 1080i the game is still rendering at 720p and then upscaling the output image to 1080i, but poorly. So by all means, choose custom resolution support and turn off 1080i when playing the game - you'll be very happy you did.