As I was posting a remote picture I remembered from long ago to express cittaja rupa. I started looking at more and more.
Here is a quote from the article:
According to an ancient Roman author, Pliny the Elder, the very art of painting originates from trailing the edge of shadow, as a maid of Corinth traced her lover’s shadow on a wall. Much like her lover’s outline, art was born from the desire to give substance to that which is incorporeal, to make permanent that which is fading. Though it can be said that shadow gave birth to art, saying that art gave birth to shadow (art) is unconventional, not because the notion of it is unthinkable but simply because there isn’t much of it out there, compared to other art styles and how popular and spread they’ve become.
article is here: https://www.widewalls.ch/magazine/shadow-art
You can google shadow art
another picture from that article is here:
Google Search for more related pictures here: