I’m an Inkscape user and I’ve been working on photo tiles. Using Jpeg files and Inkscape’s Extensions-Raster-HSB and contrast settings, things are starting to turn out okay!
These are Home Depot’s white tiles (about $1 a piece if you buy a case of them). Full speed, full power, no tape or covering needed - I tried and it didn’t seem necessary in the end. Some tacky glue and felt on the back and it’s a sweet coaster to keep discreetly on the desk at work!
I haven’t yet tried to manually adjust the lines per inch but I wonder if that would improve the resolution. Anyone have any experience with that?