Good evening.....   I remember seeing something similar to this quite a while back on here....and I thought I saw a tutorial on it, but for the life of me I cannot remember what the construction method is called or how to research how to do it.  I know someone on here can help ,e...everyone is so knowledgeable here.  :)   Thank you kindly for your help...I’d like to incorporate this construction method on a bag I’m making soon.