Stupid question i know but how do you get yafray to render halo effects as well as particles, or will it?
you can´t, but you can use duplicated objects as particles so you can maybe render alpha mapped planes…
im trying to make a little like LED light anyway that i could make it look lie it was glowing
this should help:
http://www.centralsource.com/blender/flares/
scroll down to where SKPjason has submitted his LED flare thing. oh and there is also an example of halo down there. haven;'t tried it out though, so i donkt know about the yafray.