Hi
The link above leads to a site with many images, no idea what qualifies there as reference.
The simple mechanic of lights is based on size and distance. Anything else comes after that.
The larger the light and the closer it is, the softer the shadow will be. If your light source is larger than the Gobo, the softness will eat the effect.
(I have had set up my first stage light many decades ago, and light is undoubtedly a love affair of mine.)
Gobos on a practical set are done with a projector (slide+lens), lights, or small light sources. Gobos are set relatively close to the light source to avoid spill onset, typically (except*) a small source. A certain distance is needed to define the sharpness (and again, often is more based that a light source gets hot.) Not our concern (being hot) in 3D, of course.
*The most typically “gobo” effect is created a Cucoloris, which is large and allows to be used with distant spotlights, or just to break up an already set light. The larger the distance, the smaller the light will appear, which means a harder shadow — same story.
I do not have Corona. However: Set a point or spotlight, and it should work; here is an example with native Cinema 4D tools
https://www.amazon.com/clouddrive/share/oOlKzNU0CqMyDjA7PVdFjcp4G3fJRlt8wRlGKqWSczO
In my JET series, I had dedicated each “scene” to one or more specific themes to illustrate the whole pipeline. (The link didn’t work, but I filed a report, it should be up in no time)
https://www.cineversity.com/vidplaylist/jet_master_list/jet_making_of_part_16
All the best
