Hello.
I’m doing some tests on lights and I’m facing a problem I can’t solve.
I have some complex geometries that I image to be led light. The only way I know to make them emit light is by applying light material to that solids. The problem is that I can’t apply any IES/LDT profile to that light material, resulting in a very fake light simulation.
Is there an workaround the apply IES to custom led geometries?
Thanks
Hi there, what exactly is the object you are trying to light?
AFAIK an IES profile is not something that would apply to such a shape anyway - an IES profile basically contains information on the light fixture that limits where the light can “escape” from the fixture. With an arbitrary shape as a light, this no longer applies, as there would be no way to understand how that fixture works around such a light. The solution would be - to model any geometry that would be constraining the light from going in certain directions.
If it’s a curved shape like a signature sign, then in the real world a neon light or LED strips would be used to light it. For this you could select the polys of the base of the mesh and assign a light mat to it. Or you could create a spline to emulate a neon tube and either add a light material to it or a Corona spline tag and use a self illuminated mat. There are options 
Thank you for your reply, but I am still doubtful about it. In fact, in any case, it is not possible to have control on the way the light flows out from the emitting source: for sure you can adjust some parameters in the light material, most of all the directionality, but you can not deeply control the light to have a digital twin of a stip led light. You cannot either control the intensity in lumen…
