Octane Render is a standalone application that doesn't require a specific modeling package to function. If your application can export to one of the supported file formats, you can use Octane Render. physically based renderer software It uses the video card in your computer to render photorealistic results fast...really fast NVDIA totaly support to this. yes u can import obj file and its totally node base application controls like composting software. i all way think node base software for 3d is the best for faster and optimized way to achive.

http://www.refractivesoftware.com/index.php

get the demo version and start RND on this because this is the upcoming future softwares