stylized fantasy diorama

I created this fantasy diorama over two weeks back in 2018 to practice a workflow/look for mobile games in Unity.

I based it on a piece of concept art, but I cant seem to find it now.

I spent some effort to plan it modularly to all fit together onto a single 2k texture sheet.
I tried turning the textures down to just 512x512 and it held up surprisingly well, so I've included a render of that too.