If anyone needs photorealism, I can also recommend Luxrender, a photorealistic renderer that offers several different render engines. It's completely free, open source, and it connects to Blender, SketchUp and other 3D editors very well, with dedicated free plug-ins:

http://www.luxrender.net

Regards,

Metin

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visualization • illustration • design • 3D (print) models — https://metinseven.com