Its been moons ago since I did any Blender. I remember back in 2007-2008, I took a job to do interior for a ceramic company and my only re-course was Yafaray. Makes me wonder why Yafaray never really took off as an alternative render engine for Blender. Later on, I got into LuxRender but the waiting time is too long until SmallLux comes around that uses AMD OpenCL GPU. Furthermore, Lux accepts IES light information which helps in realistic lighting.
@Sim: Have you worked with Yafaray before? What's the hindrance for adoption (other than extra effort to install and convert)?
--- Victor Yap.