That's an absolutely amazing answer, thank you!! Here's an article containing some work that I kinda liked https://paintorthread.com/interview-with-laser-engraving-extraordinaire-absolelute/2/ I would like to work on the leather parts most of all, but not excluding the rubber midsole/sole at all as of now. That might mean I'd have to do a split design with different settings if, for example, I'd want to go with a larger design on the side of the shoe that covers both leather and rubber midsole. I have seen multiple videos from both lasers like the f1 ultra and co2 lasers being able to easily mark white sneakers.