Mask Image for TShowImg?

[Kirko]

Is this possible? I'm trying to make a lantern that everything is completely black except the areas around players. I first tried with an Gui and got it to show exactly how I want it but wasn't able to finish since guis dont have attachtoowner and some other stuff I would like to use.
Would anyone know how to mask an image using images and not Guis?

this is how it looked like using Guis but cant figure out to make it using TShowImg instead.

For the Gui I just used a small black square image and stretched it then with another image thats just a white circle i placed on top.