IES on Polygons

[3dreamstudios]

Would it be possible to allow a surface with emitter to have an IES profile attached/used? But to make things more complicated that profile would be attached to each individual closed polygon.

Think of a 2x2 or 2x4 ceiling grid with lights in them. Have a single surface that would make each individual 4 point polygon that has the surface name LIGHT use a specific IES profile rather than the generic emit everywhere as it does now.

Don't know if it could be possible...but something to think about for a future feature.

[3dreamstudios]

Unless this is possible already, I figured only Juanjgon would be able to reply. Any thoughts?

[juanjgon]

The float texture node can read the IES files, so you can use the texture node linked to the emission node distribution pin to use an IES file.

Thanks,
-Juanjo

[3dreamstudios]

I'm guessing each light would need to be UV mapped but that's a start...I'll give it a try. Thanks!

[roy_orengo]

Hi Juanio,
could you help me with the shape and what dimensions I need to use to create a real light with IES distribution?
I mean it seems to me that the size doesn't matter but the shape yes. Do I need to use a plane square?
Thanks,
Roy

[juanjgon]

Yes, probably a small quad light is the best shaper for an IES light.

Thanks,
-Juanjo