Many thanks to @A_Siniawski for tweeting the link.
Deutschlandfunk has posted apiece on Shadows. The article is in German and translates well. Here are a few quotes via the google translator:
“My intention was something very personal and at the same time to explore universally valid through poetry. The project inspired me to look at grief more about how we deal with them and overcome.”
“For me this was your greatest gift: That you seen it all and I completely trust you with a project as I had never done it.”
“You can see here his eyebrows, hair on the chin, in the armpits, nipples, the belt loop. Distortions of light and a short movement.”