Pink Marshmallow

3D Printer for 2D art

09/03/2026

optical illusion Tunnel

🖤🤍 Your eyes are NOT broken, I promise.

This op art tunnel coaster is flat. Completely, 100% flat. And yet here we are, staring into what feels like an endless black-and-white vortex. The checkerboard pattern spirals inward so perfectly that your brain just… refuses to believe it's not a hole.

That's the magic of op art — and a well-timed filament swap. 🎨🖨️

Printed with a simple pause-and-swap technique in classic black, silver and white. No fancy multi-material system needed — just patience, good timing, and a love for messing with people's perception. 😄

Would you put this on your desk or hang it on your wall?

@pinkmarshmallow1009