User Data on lights

[brurpo]

Hi there and thanks for your time!

Is it possible to use user data on lights? I know that you can on mesh lights, but I would need for an area light in my case. Cant get it to work, seems to work only on geometry. Thanks again!

[Stephen.Blair]

For an area light, only the color is linkable (eg can have a shader linked to it)

What are you trying to do?

[brurpo]

Hi there! Thanks for your time!

I've tried to do that with the file texture and an aimultiply node, but not a shader, will try that!

This is what I am trying to do:

We will have hundreds of those spots, the slider will control both the material's emission and the light intensity, the sliders will be controlled both manually and through scripts. I could do it with operators and make a script that duplicates the standin while rewriting the operators but I was trying to avoid that.

Thanks again!

[brurpo]

Yeah, it does not work, it works in the scene itself, but once exported to a standin, it wont work, just meshes or mesh light.

[gshankar165]

Is it okay if you just use the aiUtility white flat color and arnold indirect Rays on for indirect lighting illumination !!!!

[brurpo]

Hi, thanks for the Idea! unfortunatelly no, and would bem more efficient to use mesh light as It Works, but I need the spread attribute of the area light.