A Kaleider Diamond Pie Kaleidoscope with 16 Petals was rendered from a photo of a graffiti covered old building.  Then the Abyss Surface was applied, which makes the pattern appear to collapse into a point in the middle.  Mask has been toggled on with the Oval Mask Shape and a very dark brown Mask Background Color.
Oval Mask Abyss Surface of Diamond Pie Kaleidoscope