I won 3rd place at Curtis Holt discord challenge with this image, the topic was "Recreate a scene from a video game", so I chose one of the levels from Monument Valley.
To make the base mesh of the impossible geometry illusion I used my paradox toolkit addon:
https://github.com/matgarate/Blender_ParadoxToolkit
Check the quickstart tutorial here:
https://youtu.be/tf6iKm49Eyk