I am getting very curious about this relation. So far all of my WILDs happened in OBE form. The order has always been like this;

waking up after 3-4 hours of sleep => staying up 1-3 minutes => SP => OBE

Although I never visualize being out of my body, it always happens like this. The room is always my room, but as soon as I went out of the window, scenery changes drastically.