Hopefully we’re still at the ‘there are no stupid questions’ phase of Glowforge… Because I have some more questions.
With raster graphics, if your whole project is an engrave, do you still have to place/embed it in Illustrator to create an SVG, or is there another file format that is supported that can be generated straight from Photoshop?
Secondly, does the resolution of the raster image matter? Is there a benefit to saving something at a higher than web resolution? Does it work like in print where you generally want the DPI to be 2x the line screen that the job is printing at?
Illustrator (for example) would be needed to add a cutline. But, you can upload JPEG and PNG straight to the Glowforge.
You definitely want a higher DPI image. I’d have to search but I showed an example of the differences a while back. That you’re asking the questions means you know a little about resolution, which is good. the unit isn’t as sensitive/fine as a printer nozzle but still pretty sensitive to resolution. Some may disagree with me on this - and that’s ok. I prefer to mitigate the risks of poor results by at least using good source material.