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Sorry for the late reply, I'm just seeing this.

It looks more complicated and difficult considering my first guess would be the sun. The instrument is locally made, probably made with bamboo. I am trying to imagine how it sounds, maybe beautifully as I figure out the shadow.

My best guess is that the shadow is artificial, maybe the lighting in the room. I hope I am right.

You are still in time. Both your guesses are right. It's a bamboo instrumemt and there is lightning in the room. The sound by the way I totally love.

A super creative day/week
🍀♥️
@ wakeupkitty

TC-WUK.jpg

Thanks for the upvote and the opportunity to participate.