Cartoonish? How to get more realistic render

There are some really good threads on this forum already. It’s not an easy ‘one size fits all’ answer with V-Ray. V-Ray is like a blank canvas and some paint and brushes and if you’re new to painting, I wouldn’t expect to get a Da Vinci-level of quality right out of the box.

Check out this course on rendering for realism on SketchUp Campus

And look at the other threads where many suggestions have been provided already to other users: