refractive caustics with mia_material
 

hi, i am working a project that uses some nice thick glass and i need to use caustics bu i cant get them to render. I have a mia_material applied to my mesh and i have use caustics checked in both the material props and mental ray props. my light (a phys sky) has emit photons set on it. is there anything I'm missing?

heres the render

I don't think the physical sky can do that, plus I think its a bad idea to use a directional light for emitting photons. I did a post on caustics . Hope that helps.