A method for regulating falls of a user-controlled character through gaps between surfaces in an extended reality (XR) space in which the user is playing a game includes compiling a record from a previously generated spatial mapping mesh (SMM) of the XR space of surfaces of real elements present in that space, with corresponding positions and dimensions; and, after the game begins, determining whether, if the character approaches a substantially vertical gap between an edge of a first surface at a first level and a second surface, at a second level lower than the first level, continuing motion of the character to fall through the vertical gap will be permitted or prevented. A similar method for regulating jumps rather than falls of a user-controlled character through gaps between surfaces in an extended reality (XR) space in which the user is playing a game is also described.