Just change the setting of your render in solid works..!!
Answered with a tutorial: https://grabcad.com/tutorials/how-do-i-print-a-render-in-solid-works-in-a-high-quality
I answered it with the solid works 2005 but the setting function is similar to any version of solid work, so simply change the setting in render window for high resolution.
TANK YU NOT ENEUGH