I've always thought that half-hitch was the same as backward loop. I don't know how invisible it is, but it doesn't create a stitch the way other cast-ons do.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry