If you don't like Smooth Motion with 3D, then you should read this!!! I just found a way to adjust the smooth motion and all other settings for when the TV changes to 3D. Right now the work around is to select Computer mode for 3D because it turns it off. However, I actually want to have it on High, not the medium it seems to set for all other settings, so this is good for those in that camp as well. So please try this and see if it works for your TV and firmware. I have a 55inch and for some crazy reason, Vizio has still not updated me to 1.06 with access to the new apps screen with the 3dGo app. It is likely that it wont work with everyone, but please test this and see if it works for you.
With the TV displaying normal, 2D content, I went into the settings menu. I selected picture and then the picture mode Calibrated (use which ever one you want obviously). I then go to the more options and access Advance picture. Now, for what ever reason I decided to hit the 3D menu and then I hit 3D output. The next screen has the three 3D options, but it also has a 2D option. So I selected 2D and my screen was instantly brighter and I was back looking at the Advanced Picture settings with all options being adjustable. This is where you can turn Smooth Motion off or for me, to High. I then went back to 3D and selected 2D then 2D. I then launched Up 3D on Blu-ray. I looked at the Advanced options and it was set to High, not medium. I also noticed that it automatically cranked the backlight to 100 and the sharpness to 70, but I'm fine with that as its designed to off set the dimming the glasses create. I tested again, this time turning Smooth Motion to off and Sharpness to 0 in the "3D then 2D settings" described above, and when the movie launched in 3D, Smooth Motion was off. As far as the brightness and sharpness, the sharpness was back to 0, but the backlight still went to 100, which again, I'm fine with.
If this works for you, then you can turn Smooth Motion off on any picture setting and only have to do it once. This way when you launch 3D, you dont have to waste a few more button clicks to change from your preferred picture mode over to computer. I honestly hope my instructions make sense and that this works across the board, because a lot of people have complained about Smooth Motion being forced on them in 3D mode. At the end of the day, it only looks like the options are only locked out when 3D content is actually being displayed, but they can be adjusted when 2D content is being displayed.