I know people are annoyed at others asking how Capturing Radiance works, but from personal experience from losing so god damn many 50/50's (I've lost 6 50/50's in ZZZ alone☠️), I've gotten CR three times, all three being after losing my 50/50 twice in a row. FYI my last win was on Xianyun's banner in 5.5, and you can see for yourself how it's gone for me.

Got CR on Chasca, Furina (which was C1 Furina and then I got C2 Furina), and now Columbina.
Yeaaaa either I am lucky whole being really unlucky, or you get CR after losing two 50/50's😶