How about IES and photon map secondary? Try this: Place IES distribution luminaires in a scene. Take note of their candela values of the highest luminaire. Set Viz/Max Exposure to uncheck but set the Physical Scale to like 10. Set Photon Map for primary and secondary GI with check on convert to Irradiance map. Set it so it saves to a file and let it calculate.
Now set Secondary GI to Photon Map "From File" and Primary GI to Irradiance. Also set Viz/Max Exposure to Enabled Logarithmic and the Physical Scale to the candela value of your highest intensity luminaire. Render and that is that.
Have fun with it,
Ismael
Edit*********** Better set Physical Scale= Candela/100 ****
Now set Secondary GI to Photon Map "From File" and Primary GI to Irradiance. Also set Viz/Max Exposure to Enabled Logarithmic and the Physical Scale to the candela value of your highest intensity luminaire. Render and that is that.
Have fun with it,
Ismael
Edit*********** Better set Physical Scale= Candela/100 ****
Comment