Does someone has this reference image?

[marc_gibeault1]

I used an image for a long time to guide me when using decals in V-Ray.
The render was of a calculator and there were screen captures of all the settings for the materials, masks etc. on the same image.
Ring a bell to someone?

[konstantin_chaos]

You can check the official Chaos documentation page for the Decal - https://docs.chaos.com/display/VRHINO/Decal
There is an instructional video on the same page.