Artwork does not have to be perfect. Most orders start with a JPG or PNG pulled off a website, a photo of an old shirt, or a PDF from a designer who has long since moved on. A digitizer rebuilds it either way.
What matters more is the detail around the artwork: the garment, the finished size in inches or millimetres, and the machine format you run. Those three decide density, underlay and how much detail survives.
If the artwork will not carry at the size you need, we say so before starting, and suggest what to simplify. Our artwork requirements guide covers what to send.