On visual artefacts
Moiré patterns, an interference effect created when two similar grids such as lines, dots, or patterns, are overlaid at slightly different angles or scales. New patterns emerge as a set of wavy or curved lines, visually striking and complex. When you zoom in and focus on the linework you don't see the pattern, it is only by looking at the drawing as a whole that artefacts appear.
These effects, often avoided or corrected, dwell in the liminal, born not of matter but of thought's yearning shadow. Shimmering on the edge of perception, phantoms woven from absence, yet their weight presses upon us as though they were carved from stone. Artefacts, unseen yet seen, speak of the human mind's power to sculpt void into meaning. A chair that vanishes beneath a distracted glance, a key that jingles only in memory, each tells of a world where reality dances with imagination. In paradoxical presence, they remind us: what is not there can shape us as much as what is, for the artefacts we perceive are as real as the act of perceiving itself.
I find these visual artifacts fascinating and did a few experiments using multiple CSS background patterns, please check the animate option and see the patterns emerge.