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I honestly think the only convenient way to get a serious result is to make use of Matadorlight. You just export to obj. format and you handle all the rest in Matadorlight. The export is fast, and at least you have a material library.

Is there anybody who has been able to generate a photorealistic scene with this plugin?

yep,

you start with nothing. But the maxwell materials are easy to set up.
It really works nice.