Hi Eric,
Please could you share your success in using IES profiles to simulate a vray rectangular light ?
I currently have this exact requirement for my first project in Unreal - the success of which really depends on it !
For my scene I have 300mm wide strip lighting that runs continuously, with no breaks, throughout the ceilings in my building.
I cannot replicate this with the current lights that are available in UE4 - in Vray, a simple plane light (or actually, a mesh light) would be two good solutions.
I use Max.
Your quickest response would be very, very much appreciated.
Kindest regards,