It took me a few minutes, maybe five or so, but it felt longer. I must say that it helped to read some of the little hints on this thread about what sort of illusion I was looking for... You know how the Cs say that 'awareness' is key in regards to moving to 4D? I wonder if it will be something like this, but instead of a picture of a wall, it will be all we perceive from reality, and instead of the 'hidden thing', it will be a completely new aspect of reality - one that was always there but somehow we failed to notice until then. And once we can perceive it, it will be harder for us to not see with it than to see it.