Best MD3D settings to avoid moire and contours in renderings ?

[tomot]

When I produce larger format image renderings in Mandelbulb3D, I see a considerable amount, of what best can be described as, contour generated lines in the final rendering. I don't know if these contour lines are associated with anti-aliasing or moire effects.

Question: What are the best in Mandelbulb3d, that will avoid this from concurring in the final render?
please click link for pic,

 http://postimg.org/image/exiqhqgmj/

TIA!