Why there is no outline
A traditional tattoo is a bold line holding an area of colour or shading. The line does the structural work: it defines the shape and it holds it as the tattoo softens over twenty years.
Realism has none. The shape exists only because a lighter value meets a darker one, which is exactly how a photograph works and exactly how skin does not want to behave. Every transition has to be built with enough separation between values that it still reads once the tattoo has spread, which it will.
That is why a realistic piece drawn tightly at photograph scale ages badly and one drawn with deliberately exaggerated contrast ages well, and why Auden’s work looks slightly more contrasty on day one than the reference did. That gap is the whole craft.
Why it books in full days
A value transition that crosses a session boundary is visible. Skin that has healed for four weeks takes ink differently from skin worked ten minutes ago, and a gradient completed across two visits carries a faint seam that shows in photographs for twenty years.
So work is planned so each region finishes in one sitting. A half sleeve is three or four full days spread across several months, not twelve two-hour appointments, and the days are long: eight hours with two real breaks.
The reference photograph
The highest-resolution version you can find, and preferably several of the same subject. What matters is not sharpness, it is light: a photograph with a clear light direction and real shadow has structure to work from, and a flat, evenly-lit phone photograph does not.
Bring the original file rather than a screenshot of it, and bring the ones you rejected. If it is a portrait of somebody you know, bring five photographs of them rather than one, because a likeness lives in the relationships between features and one image will not carry it.