What is the simplest and easiest to use free renderer for MoI?

 From:  Sergio
651.37 
I just tried the hypershot and is very easy and straightforward to use.
Take my 10 minutes to make this picture based on an existing Rhino file.
The importing feature work very well from rhino, recognizing even groups of parts.
Looks like the program is very easy to quick use but getting deeper on it there is a lot more powerful features.
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