Very nice, I always like a good Escher tribute. Looks very real. Good wood
texture! It's also quite dark but this works well.

If you solve the blotchiness (looks like radiosity artifacts to me) and
re-render it, then you might also consider using a longer camera angle to
prevent the outer spheres being stretched by perspective (if this means putting
it outside the room then the no_image keyword might come in handy). Just a
thought!

keep it up
Bill

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