Thank yoo for all the answers

Well, I think that Bunkspeed shot it's very similar to Keyshot (except for the lightsources)
and it's still very product design oriented (am I wrong?)

And so, maybe I have to learn how to use Maxwell or I have to try Thea render that it's very popular around here

Do you have some exterior renderings to look at?
thank you in advance

Edit:
I'm just trying Thea Render
It seems to be just what I was looking for, even if I have no materials now.
But I still want to see your works

Hi guys
I'm new here but I follow your forum from a very long time

Well well, what do we have here
a Render Engine comparison for Sketchup!

Just what I needed!

Let's say a couple of things
I've tryied Lumion and I really don't like it!
I loved the idea but it's a way to slow o my PC (mobility Eadeon HD 5400)
The Cryengine 3 instead, works very well, but I just tried Crysis 2 not the SDK (I think it would be too complicated to me)
And I also tried Keyshot and I've found it very very useful, but it's mostly for product design and not for Architecture.

And so I'm still looking for a render engine
something quick and "wow" like keyshot but for exteriors / interiors etc
What about Fryrender?
No one voted it but I remember a very useful function to swap the materials post rendering (without having to re-render the scene).
But I'm not able to find any updated information about it in their website.

What do you think?