I was in a store and saw this artwork for sale:
I want to make a print in the same style from one of my photographs.
If I had to guess, this looks like a chroma key or someone spent a lot of time cropping.
It looks to be 3/8" glass or acrylic substrate.
What do you call this type of print/process?
What type of camera resolution would one need to accomplish this?
EDIT1: Style: I meant I want to create a poster size glass image using one of my photos with the background removed.
Type: I meant to ask for the minimum resolution needed to create a poster size glass image, as pictured.

https://photo.stackexchange.com/questions/98904/how-to-create-a-gray-black-color-background-in-a-photograph
https://photo.stackexchange.com/questions/39456/black-background-post-processing-tips
Sorry, I edited your question before seeing that there was an answer already addressing it.
– Saaru Lindestøkke Mar 11 '20 at 19:38