In this paper, we present the development and results of an experiment in which virtual environments (VE) with altered gravity direction are traversed by real walking. We found similarities to redirected walking and pursued the goal to identify thresholds for the extent in which shifted gravity can be applied in room-scale walking scenarios in VEs. From the results of our experiment, we give a first estimation for possible thresholds for this sort of application. Additionally, we observed a learning effect after a short time period. We considered altered gravity direction to be promising considering an actual implementation in virtual reality (VR) applications as well as future research.