Mxsmanic wrote in
:

writes:

Looks to me more like a detail issue, with the resolution
that diminishes with distance causing the illusion.

Each image actually contains two images, one that is simply blurred,
and one that is a line image with heavy unsharp masking. At close
range, the fine lines of the unsharp-masked image are visible, and the
image built that way is more prominent. At a distance, the adjacent
bright and dark of the unsharp-masked lines blends into a constant
gray, and the contours of the blurred image become more prominent.


Uncanny


Bertie