Hi arjun118,
As I had pointed out, here…
https://www.cineversity.com/forums/viewthread/4632/#18852
… light has two key features that will dominate anything else, size and distance. If you use a Spotlight, this spotlight is pretty much a point with no dimensions. In other words, it has a size equal to zero. This works only in virtual environments. A small Halogen light source might come close to it.
To get a shadow that would resemble a Fresnel Spotlight, with a lens diameter of ~10 inches, we need to switch the shadow from Raytracing to Area and then go in Light>Attribute Manager> General> Shadow Area. Then go to Details> Area Shape> Disc, and set the size accordingly.
With this, we have not only a certain distance, given by the Light object’s position, but we also have defined the size.
Please have a look here:
https://www.cineversity.com/forums/viewthread/4632/#18852
The larger the disc, the softer the shadow will be. There will be a point where only a small area behind the object will have a shadow. Look up umbra, penumbra and antumbra.
(I would avoid the shadow quality of the Soft-Maps (Soft) settings, as this is not anything that really produces a shadow, it puts “probes” out and samples from these probes a “shadow” simulation. This can produce artifacts., This light source is especially bad in handling contact shadows.)
All the best