...that there is something besides the "thingies" (QRC?) on the markers, so people without "smart' phones know it is an orienteering course.
Sounds a lot like MOBO. Cool.
Can a diagonally sliced QR still be read?
Can a diagonally sliced QR still be read?
No. That's just their logo. Look at the example in the photos, like in the header on the front page.