IES light - openGL 3d representation

[alemanda]

It would great to have a representation of the IES light in OPENGL 3D view.
It would speed up the creation of working 3D pictures.
Essential!

[Paul King]

Also equally make them such that the IES information follows the light into Octane render plugin, for photo realistic instant feedback

Also give them sliding emission projection/angle controls so can test and learn what IES parameters would look best in the context - which can then assist in locating appropriate real world products