[seghier]

Hi
i create many objects to use them as lights but when i apply ies ; some lights don't have lighten surface
(sorry for english )

[feynman]

Have you turned the sphere to which the IES emitter is applied the right way?

[choo-chee]

IES works best with small 0.5 cm diamenter sphere rotated to face the wall to be lit.

[seghier]

hello
thanks for reply . i apply emitter material to the objects than i choose ies
but the problem in the color of objects

[Mihai]

I think depending on the IES file you use and its measured shape, the object you apply it to will turn black. You could just add a second weak emitter material to it to avoid this I guess.

[seghier]

thanks Mihai
if i add other emitter material this make the render slow ?
i use more than 30 ies in one floor