Definitely SU is suitable for architectural works. But if it's necessary to go further, I would rather use Rhino instead of 3DMax. I've once tried to learn 3DMax by myself, but I was close to break my laptop so I gave it up.

A simple but expresive enough technique. That was the first technique I learnt. Thanks, Dennis.

Yeah, I noted the same thing. I think it's beacause Vray is running inside SU, like a plugin. I would like to know why the creators didn't consider VRAY as a standalone software so to use just an export file like Kerkythea.

this is so much time for a low quality render, that takes 2 or 3 minutes in kerkythea. You might try KT so you can compare and see if it's your computer settings or the software.