jagged edge in renders (cycles)

Hi guys,
doing some rendering i have observed that cycles makes awful jagged edges on some parts of the model i have. Especially where transparent (blank) in in the back or at curved surfaces.

any idea what i need to do to get realistic crisp lines ?

Is this when you look at the render result in blender or some other application ?

If in blender
Ensure you are looking at the image at 100%
In the render window you are looking at the image with alpha, not just RGB, otherwise you won’t see the anti aliasing

Both these apply to the blender renderer, not just to cycles

omg! it was such a simple thing to do. yet so annoying :smiley:
you saved me, thanks so much Richard Marklew !