need help with caustic attempt

My first attempt at caustics and its quite pathetic i agree. How do i get rid of the dark sections around the edges in the image ?
http://myweb.tiscali.co.uk/seevisions/caustic.jpeg

Increase your RayTransp Depth.

Martin

RayTransp Depth is currently 10 which i think is the max.

in the yafray tab there is a slider that says raydepth - increase it to, let’s say 15 (by default it’s set on 5 I think).

  • in the photon light increase the blur amount.