Nice to get some feedback
I've got some vray / indigo comparison renderings already. However they're hand adjusted and customized. And I'm aiming for automatic VRay scene interpretation. Of course, for some phenomena (dispersion, complex IOR) or better control user would need to switch to native material. Nevertheless, I'm getting closer to my goal, so stay tuned.
Note: I plan also to add support for MentalRay and Maxigo in future (or any other material, if there's need for it)
!!