Saving GameObjects as an image(2D)?[RESOLVED]

Is it possible to save a set of GameObjects in a scene as a PNG with a script? To be more specific, I'm trying to implement a map generator similar to the one in this video for a roguelike in the same vein as Caves Of Qud but want to be able to save the generated maps as PNGs to store multiple levels at a time at the initialization for loading later.

 

it sounds like storing them to png wouldn't be very efficient.. and those maps/images could be huge?

or if you have fixed random seed generator, then you could just save the seed,
and then generate required areas on the fly..?

 

Why save the maps as PNG instead of pure data, be it a binary stream or json or yaml or xml or your own custom format?

 

I should have mentioned that I'm asking this hypothetically here, at the moment I just want to know if it's possible because...

I have considered that, but wanted to have a visual representation of all the levels (I want to generate several at startup and load them as the player completes them) and this was the first idea that popped into my head. At the moment I'm not worried too much about efficiency as the maps are going to be small and there won't be many of them. Just a beginner trying to feel out what's possible and what's not.

 

so to save screenshot as png,
https://docs.unity3d.com/ScriptReference/ImageConversion.EncodeToPNG.html

 

Thank you, exactly what I needed