If your trying to phase, it sounds like you were close.
After a while, those images will last for longer and eventually one of them will fill your entire viewing area and when this happens, you'll be instantly pulled into the scenery or you just mentally push forward to phase into the astral.
Ahhh..OK! That is very helpful. I see 'images' all the time. So you are saying focus directly on one that 'fills the screen' so to speak then ...Waa-La I am there?