After spending a lot of time using Agisoft PhotoScan/ Metashape , I am thinking if this is similar to what the old days people use the stereo pairs ?
So for example, you have two image that were printed and you put them under the stereopairs. You then try to move to find the features i.e. rock, move together to see that rock "push up" ?
I remember working for my last job and they had that and I had a really hard time to understand until I practice and discovered the features "push up" COOL !!!