Quote - What I would like is someone with the required knowledge, to create IES presets for use in Reality. I've seen plenty listed, but the terminology they use to name these files mean nothing to me LOL.

 

IES files are actually simply text files that give light measurements if footcandles (US) or Lux (Rest of the world) at different distances (e.g. the light distribution and efficiency). This can be for an individual light source (bulb), fixture, , room, or outdoowr area - depending on what you want to do.

 

The ones you directected me to we for fixtures. so this takes in account losses from ballast, light center, and the reflector.

 

Do you have an IES scene done  already Paollo?

I trust the IES upload is fixture centric not room centric?

 

It would be a bit of work. If not I can give it a try with some info.

 

I trust in DAZ/Reality you use geometry like in 3D-Max or AGI 32 that approximates the fixture/light source, position it appropiately in the scene, and upload the IES text file for each type (group) and that represents the fixture light output?

And this overwrites whatever you do manually with the sliders?

Does LuxRender automatically calculate the reflectance values of walls celiling floors, furnature and such by the materials you use? Or maybe it take the defaults (80% for walls etc) from the IES files