Photos, like any information, may not always appear real. And illusory images may seem real, authentic. The light suggests, imagination intervenes, and in the end, these camera images are ruthlessly realistic.
There are thousands of chapels in Greece. Most are modest, in size, in their execution, and in the materials. Unpredictably, this design appears in a small apse attached to a chapel of circular floor plan. The articulation of painted plaster shapes gives an impression of cut jewels. Rectangular tiles at the bottom of this arc are of the ceiling above and beyond the apse.
It can take a lot to create the inexplicable, so beautifully, and worry later about its impact.