Guys, im having a serious trouble. I just finished a character eyebrown and i want to convert the particles to make a final adjustment in the generated childrens, since some of them i donthave control. So i converted this particle system and edited the generated mesh, but when i render i cant see this mesh! Plz, somebody can help with this, its trouble me, lol. Thanks in advance!
Does the converted particle system have any faces? or is it just edges? cycles wont render just edges.
Try converting the mesh to a curve, and adding bevel depth in the curve settings panel (Be sure the fill type is set to full and not half). then convert back to a mesh and it should render 
(Be sure not to add too high of a resolution if you have lots of hairs, as the result could be very high poly depending on the amount of hairs)
Jamieeee, thx a lot man!!! Worked!! Love you man, thanks a LOT for the tip!