Tilt or Depth Illusion is a card sleight in which a card is seemingly placed into the middle of the deck while really placing it beneath the top card.
Usually credited to Dai Vernon as the "Depth Illusion", Ed Marlo published and popularized the move in his booklet Tilt! (1962). Vernon's handling was later published in The Pallbearers Review Close Up Folio #10 by Karl Fulves.
There has been much controversy over the history and credit of this move which can be read in:
- The Pallbearers Review Close Up Folio #10, pp 1025-27, 1977.
- How Deep is This Illusion? in Sticks & Stones #10 (1977) by Jon Racherbaumer.
- Ken Krenzel's Front Tilt in The Card Classics of Ken Krenzel (1978)
- Ed Marlo's The 380-Degree Tilt in Marlo Without Tears (1983)
- Fr. Cyprian's Untilt in Apocalypse, Vol. 8, N° 8, Aug. 1985
- Bill Kalush's Tilt Finesse in Totally Out of Control (1992)
- Ambi-Tilt in The Books of Wonder, Vol. 1 (1996)
- One-handed Tilt Get-ready in Card College, Vol. 4 (2000)