...Slowly, imperceptibly at first, the apartment's walls grew thinner. At first this was nothing more than a feeling, a belief it was happening.
Every boundary slowly diminished.
All four walls thinned, faded. So, too, floor and ceiling. Though they still existed, still held the properties of the stone and wood that formed them, it soon became obvious that colours could be seen through them.
Soon those colours took on more definition as the walls became more insubstantial, shapes became visible, pinpoints of light grew all around them, above and below.
And then, timeless and formless, the apartment ceased to exist.