The focus stacking technique is useful for die variety forensic work. Wouldn't it be nice to be able to see what the die looked like that created the variety? It's possible to do this using focus stacking. Here's a simple example photo study of a die "gouge" or more likely "dent" on a 1957-D Cent. First is a 2D focus stacked rendering, followed by 3D perspective rendings from a couple angles, then an inverted rendering that shows what the die looked like in the dent area.
I’m looking at these images and reading your post here and wondering why a smart guy like you cant just put all that crap in a computer and print that die on a 3D printer? EXCELLENT work BTW
Yeah, Ray has some amazing stuff. I've been waiting for him to blow our minds. That virtual die is one of the coolest thing's I've seen on here. I'm trying to reverse engineer how he did it.
I've looked into 3D printing these but it's easier just to publish photographs. Might be nice to have something to hold but digital photos take up less space. Plus, what would I do, 3D print and then take a photograph of the object to share it with all of you? Something you may not know if you have not done one of these 3D renderings is that you can rotate the rendering to any angle and view it on-screen as if it were a solid object. This really helps in making attributions. Thanks Justin! Hint...you have everything you need already to do it. Just need to hit the right buttons...
Here's a fun thing you can do with focus stacking. This is a 1954-S RPM#4 Lincoln Cent again, taken at 20x magnification, animated in 25 different perspectives.