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Nice! Would love to hear more about your 3D art process, more specifically texturing, and also about what I guess is a render to texture camera. Cheers! 

I will cede to Marina for the 3D stuff!

In Unity you can tell a camera to render to a Render Texture. And so if the render texture dimensions are small, the image gets kind of grainy/low-res which is nice for some art styles. Then the render texture acts like an image file Unity can use, and it can be displayed in the game's UI.