anyone tell me what is the best rendering setting in solidworks????

There is no "best rendering setting" in any rendering software, even professional ones...
Every model has its own unique shape, curves, materials, etc. which leads to different rendering settings.

If you need further help, post in this group:
https://grabcad.com/groups/rendering

There's no best setting when rendering its up to the one using it.
Try to imagine your drawing in actual what should it look like and where should it be placed. The more knowledge you have in rendering the more realistic you can make a drawing real.

Hint: Try to use Studio Room 2 for background in Solidworks for me it has the best lighting position and setting.