@kali66 here's my attempt at the second challenge you game me. The prism I have isn't perfect, it has many scratches and is a bbit cloudy. BUT, I think I got a pretty good comparison and rainbow - after lots and lots of failures and rotating the blooming pyramid of plastic!! Thanks for really interesting challenges (as ever!)
@grammyn I did actually try and get one in the prism and one not. Thanks katy
@grammyn I did actually try and get one in the prism and one not. Thanks katy