Wiring parameters through a global multiplier

V-Ray V-Ray Common Off-topic
1

I am looking for a way to wire many different controller values through a multiplier.

For example, I use VRayLightMtl to light interior shots. There are many objects throughout the shot, all with different multipliers in the material. I would like to have a global multiplier that controls all the materials or a group of materials. Wired to a slider manipulator would be great.

I use the Parameter Collector often but I haven’t found a way to multiply all the values.

I’m sure there is a way via MXS with
(
     for i in 1 to AllMyObjects do
     what I want you to do
)