VRay Camera override live-preview??

[KVMaster]

Is it possible to see what a Vray camera will look like before you actually render a scene? For example, let's say I want to use a cylindrical (ortho) camera. I set the override but my viewport still shows the standard camera without any of the distortion. Needless to say tweaking it this way is quite difficult as you have to render every time you want to see the changed effect. So, is there any way to see the distortion from the various vray camera types in the viewport?

Thanks!

[KVMaster]

Bump ... no solution to this?

[^Lele^]

I think it was mentioned by vlado that there are limitations to what the max viewport will allow.