Ordinarily, the direction of 
gravity is aligned with a main 
axis of a structure, such as a 
room, so that both information 
about gravity and visual cues 
cooperate in determining 
perceived orientation. This also 
holds true outdoors, where the 
ground is horizontal and trees, 
buildings, and the like are 
truly vertical. But in some 
cases, such as those of the 
tilted rooms, a conflict exists 
between information about 
gravity and visual cues. One 
way to explain the outcome of 
this conflict is in terms of 
visual capture. Not only do our 
own bodies look like they are 
tilted if they remain upright 
when we are inside a tilted 
room, because the visual 
information overpowers the 
gravity-based information, but 
they feel tilted, too. If so, the 
veridical gravity-based 
information is not directly 
taken into account; instead, 
the perceptual system uses the 
distorted, proprioceptive 
perception of body orientation 
in the computation of 
environmental orientation. As 
a result, all information about 
horizontal and vertical 
orientation is now congruent 
rather than in conflict.