I have these images (the national flag of the Ukraine is the primary component, folds (only one of ten cells shown here) is the modifier) that I would like to merge, with the 'folds' darkening the corresponding pixels in the primary. (I also have a version of folds without the flag pole, so that wouldn't be canceled out ... this version is just to show the relative positions of everything.) I have absolutely no graphics talent, and have just begun learning to use the basics of Paint.net. Perhaps the answer to my question lies in the (proprietary?) file format .pdn ... which I have not searched the manual for how to use the format. If my answer is simply "RTFM", I will do that ... but if what I need to do is not supported by Paint.net, I need to know that before I invest my very limited time in reading dry material.
If there is a user-friendly and layman's tutorial about the use of the .pdn format, I would appreciate a link to the thread.