Glass Spacing and the Endless Effect: What Makes an Infinity Mirror Feel Infinite

A cheap half-silvered film gives a dim, greenish tunnel with visible tint on every reflection. We specify optical-grade one-way coatings with a controlled reflection-to-transmission ratio so the first reflection is bright and each subsequent one steps down cleanly. That single choice is the biggest driver of perceived quality.

The back mirror matters too: it needs to be flat and fully reflective, because any waviness multiplies across the tunnel and makes the depth look wobbly.

The gap between the two glass layers controls how far apart each reflection appears. A wider gap reads as a deeper, more dramatic tunnel; a narrow gap gives a tighter, more contained effect. We tune this to viewing distance — a lobby wall seen from across a room wants different spacing than a logo sign viewed at arm's length.

Spacing also has to stay parallel across the whole piece. If the layers drift out of parallel, the tunnel skews to one side, which is why we control it in fabrication rather than leaving it to on-site assembly.

LEDs are placed around the perimeter of the cavity and hidden from direct view, so you see the reflected tunnel rather than the diodes themselves. Density and diffusion are tuned so individual points blend into a continuous line of light — the enemy is visible dots or a dotted first ring.

For colored and RGB builds, we keep the LED plane even so color stays consistent as it recedes. The result is a tunnel that looks engineered, not improvised.