When I was younger, flying was hard because I'd inevitably crash the experience by looking down. However, after spending a lot of time staring out of windows o

When I was younger, flying was hard because I'd inevitably crash the experience by looking down. However, after spending a lot of time staring out of windows on planes I discovered that I could actually now "look down" in dreams and not crash. Reflecting on your comment about there always being something on the horizon, I realized that I've always imagined being surrounded by a fairly sparse cloud layer while "in flight". So my two pieces of advice are: (1) Build up your neural network's ability to support large scenes by observing large scenes, and (2) consider things that would be reasonable to find around you while in flight (clouds, planes, other flying people, birds, etc) and actively try to find "yet larger buildings" as unreasonable. Staying in a lucid dreaming state, for me, seems to be more about knowing when the density of ambient "plausible reality" drops too low and steering (or snapping) yourself away from those areas.