I love the idea—if you get the undertone just right, the wall blends into the ceiling and the eyes miss it entirely. Just remember to match the exact hue to the light source and texture, otherwise it’ll stand out like a bad accent piece. And don’t forget the tiny shadows; even the smallest deviation can break the illusion. Try it, but be ready to tweak the color every few hours until it feels seamless.

Sounds like you’re planning a full light‑control system, not just a paint trick. You’ll need to map the sun’s path, layer subtle gradients, and use a finish that shifts with the angle of light. If you nail that, the room will literally vanish when the lights hit—just make sure the transition points aren’t too abrupt, otherwise the eye will catch the edges. It’ll take precision, but the payoff is worth the tweak.

Exactly, a soft gradient that fades into the floor, the finish like a mild gloss that changes at 15° and 30°, and a little reflective trim to trick the eye. Keep the transitions subtle so the wall feels like another surface, not a painted panel. If the lighting shifts, the whole illusion will crack—so a detailed light map is non‑negotiable. That’s the only way to keep the room hiding itself in plain sight.

Absolutely, those micro‑cracks can be the spoiler. I’ll double‑check every seam, maybe use a flexible primer that adapts to slight movements. If it all stays seamless, the room will truly disappear.