black blob in yafray

Im trying to learn yafray mostly through trial and error. and i cannot understand why THIS happens. please help a fella. yafray is otherwise really gorgeus so i would like to master it.


It would help if you post the settings or the .blend file.

Is Raydepth high enough?

how shiny/glossy is the material for the cubes,and what is the scenery like up above the camera FOV? if thats a black face, and the cube is glossy enough, then its gonna show up black… best way is to show settings, or a .blend… im sure someone will be able to help then…