Comfortable amplified locomotion in room-scale virtual reality: a counter-moving floor, stance-based translation gain, and a jump amplified within the real flight time

Room-scale virtual reality is limited by the size of the real room. Translation gain lets a small room hold a larger virtual space, but it commonly causes discomfort. This technical disclosure describes methods, usable separately or together, that make amplified locomotion comfortable in a play space of about 2 x 2 m: (1) a counter-moving floor ("travelator") that moves the floor pattern under the user by exactly the distance the amplification adds, so the near ground passes at the real walking speed; (2) stance-based translation gain, which amplifies only a floor point that moves on genuine relocation, so bending and leaning are not amplified; (3) a trampoline floor and pads that dip and spring under the user's feet; (4) a jump drawn higher than the real jump, whose rise lasts exactly the real flight time and whose fall takes a short, fixed interval after the real landing. Implemented in a room-scale VR game developed by Ridiculus (Unity, Meta Quest 3/3S), September 2026. Published to make these methods freely available.