Question Jagged Shadows

I have this Swipe card Writer in my game that looks like this (rendered outside Unity):


In game, I find that no matter what I do settings-wise, it produces these really weird jagged shadows (see on the wall behind, and "inside" over the red LED area):


I've tried tweaking every shadow setting I can find and haven't fixed this even slightly. Nothing seems to affect it. The shadow is being produced by a realtime light - no lightmap.

I've also looked at a bunch of threads around "jagged" or rough shadows and not found any suggestions that have helped when I apply them.

Does anyone have any thoughts/clues as to things I might be able to look into?

NOTE: I'm seeing this on other objects here and there too - things like this where it has like indented sections and stuff like that.

 

So this is weird. I just created an empty scene, drop in a cube, put the Card Writer on top of it. Basic Point Light, turn on shadows, and it's totally fine...

So why doesn't it work in my "real" Scenes... hmmm...

 

And if I take the light in the room in-game, and move it closer to the table "live", the shadow cleans up more and more, the closer I get. The further away the light moves, the more jagged the shadow becomes... HMMMMM...

 

I just found the following which essentially describes exactly what I'm observing here. I'll keep digging into it... I need to eventually fix it one way or another.

https://stackoverflow.com/questions/41648360/how-to-get-rid-of-shadow-teeth-in-unity