In addition to adjusting render settings, you may need to adapt your materials.

I'm not sure which figure this is but his face shader is a lot less shiny than the back of his head or his arm.

The bump map on the table and chairs seems a little strong.

And your lighting seems to need work. I don't see any shadows. Make sure you don't have too many lights and make sure at least one light has it's shadows turned on.

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