To achieve better quality render

Once you render you 3D View with either the fill or texture mode.

Click on the Enhance View button in the ribbon toolbar.

Slide the Smoothing to High.

Tick on Enhance lightning and Dithering

Then click OK.

The 3D Image will Re – Render to a higher quality

You will notice a lot of the jagged lines will disappear.

 

 

You can see the progress during this at the bottom of the screen.