[Rogurt]

Hi all

if I put an emitting material with an ies file on a freshly created spere in c4d the emittance looks just as supposed to. then I rotate the sphere but the light wont change direction. neither in fire nor in render. if I export to studio and rotate the sphere here direction of the emitted light changes accordingly. I tried this with parametric/polygonal spheres and changing the objects rotation or only the model axis but to no avail.

Can anyone help with this?

Cheers
Rogurt

[Rogurt]

with c4d lights set to use IES data direction can be tweaked just fine. then again one cannot change the strenght of the light

[JDHill]

It should work if you put your IES material on a Cinema light, rather than on geometry.

[Rogurt]

well it´s almost worse than before. now I am able to change the direction - only the initial rotation is shifted by 90°. then when I try to change brightness I find that neither the entry in the "Watts" field nor the "Power" changes the brightness in the resulting rendering (tested in fire). the rgb colour entries show changes but only with hue and sat not the luminance...

[JDHill]

Yes, IES emitters do not currently support changes in intensity. And to be clear, by IES material I meant a Maxwell material, with an Emitter component, with its IES path set. I only say that because I get the impression (from your use of the 'brightness' term) that you are putting a Cinema material on a Cinema light.

[Rogurt]

by IES material I meant a Maxwell material, with an Emitter component, with its IES path set.

that is perfectly clear. maybe I need to be more accurate in nomenclatures in future posts