I believe you can purchase some of his scenes and tear them apart. Its a great way to learn by example. You can see lighting setups, material graphs camera settings etc and them implement them in your own projects and see how they work. Thats probably the best way you can learn. Bertrand also has a blog where he gives tips and tricks i believe.
Pretty bold request for a first post in the forum :] I suggest you to read this: This Image!! - Corona for 3ds Max :: Help Required - Chaos Forum
Take a look at the boundary blog aswell.
http://www.the-boundary.com/blog/
Peter and Henry do some fantastic tutorials and you can purchase their scenes too. Those two guys, Bertrand and Alex Roman are pretty much the reason im in 3d for a career and its great that they share their knowledge so readily
There is no law… but are principles.
Yes, just dream on… or study well & work patiently.
Tho if you must know, in short: know Light, Computer Science and Art.
Practice & mingle.
Stay true.
So simple.
Good morning,
Have you ever wondered that, if the answers don’t satisfy you, it may be due to the question being wrong at the beginning ? Sorry to appear a bit “direct”, but I’m a regular user on another (french) forum focused on archviz, and we often face questions like “what’s the trick on making great images” … think about it 1 minute, and you’ll understand why this a bad question. If you don’t, well …
My 2 cents.
What’s that forum ? i’m interested 
To learn his methods, you need to look at his scenes. thats the simplest way.
One single image is no good ground to base your entire skillset on.
You should also look at learning photography. Bertrands renders are typically very nicely composed. that helps alot.
But really, look at his scenes and see how he has done what he has done.
So you think there is secret tutorial hidden somewhere and if you’d manage to get your hands on it, then suddenly you’ll be able to effortlessly produce images, rivaling in quality those of Bertrand Benoit? Well, good luck in your search then ;]
So, case closed?
Tools do not a craftsman make…
Just because you have a renderer doesnt mean you dont need a solid chunk of expertise in photography, modelling, material creation, Post production, composition and above all, design. All of these things culminate in the quality of Bertrands images. its not just as simple as doing a 4 hour pluralsight course or reading a book. Tear down his scenes and look at the detail he puts in, the materials and how they are made etc.
why cannot you join? They are offering online training…
If anything for me personally, I think a key to making great work arch viz work has nothing to do with software at all. It’s mostly about observation and learning to see in new ways, noticing that which you previously had not, and finding something that fascinates you in everything. As Thoreau said, “It’s not what you look at that matters, it’s what you see.”
So noticing minutiae in everyday life; like how light hits objects and reflects light, finding wear and tear on objects from extended use, seeing the grime and stains coming off of window mullions etc. Then taking those observations and interpreting that into your models, materials, and lights.