how can i smooth a render

am trying to render am object in yafray render but is coming to sharp, how can i make it
a little bit smoother or blur!
i tried using the OSA settings but nothing! :no:

Most people hope that the OSA won’t blur the rendered image, so it is a good thing.

Have you thought of playing with the DOF settings : this could lend to interesting results.

Jean

yeah but the OSA use to work for me before :yes: so i though i was overwriting the OSA settings with another command or something else!

Yafray has its own Anti-aliasing it does not use the OSA settings from Blender. Check the wiki and scroll down to the Auto-AA section:
http://wiki.blender.org/index.php/Manual/YafRay