Red for mountain and blue for valley is common. The other one is dash for valley and dot-dash for mountain if only using black and white.
(But I do note that Robert Lang uses a different system in his book Origami Design Secret) Winnie Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows From: Diana Lee via Origami<mailto:[email protected]> Sent: Tuesday, 20 September 2022 1:17 PM To: [email protected]<mailto:[email protected]> Subject: [Origami] What is current status on the color of mountain vs valley crease lines Hi, what is the currently accepted convention on showing mountain vs valley crease lines? Are we using red lines to indicate mountain folds and a blue line to represent valley folds? thank you, Diana
