Smooth at rendertime w/o smoothing the UVs

#1

I plan to smooth my models at render time to make them look a bit more realistic and get rid of the jagged edges. I tried normal maps but they do not work that awesome. I need to know if it is possible to smooth my meshes at rendertime (tessellate?) without messing up the UVs and causing texture distortion.
I will be using Vray or Blender Cycles.
Thanks in advance,