Nothing on this site asks for words. Whatever you upload is the whole of what you're buying, so the file is the decision that matters most. These four pages take it in order: getting the photograph right, seeing what a style does to it, seeing all five styles on one steam scene each, and working out how big it can go before it stops being sharp.
The three questions, in short
Is the file good enough? Upload the original from the camera or phone, never a copy sent through a messaging app, because those are shrunk on the way. Which treatment? Print it as it was taken if the light and composition already work, or choose a studio style when the picture needs a stronger look. How big? That depends on the pixels on the shortest side, and the size guide gives the figure for every size we make. The site checks the file when you upload and only offers the sizes it can carry.
A short check before uploading
Zoom the file to full size and study the subject, not the whole frame. If the numbers on the cab side or the name on a station board are crisp, the picture will hold at a good size. If they are smeared, the file has been compressed somewhere on its way to you, and the original is worth hunting for. Straighten a tilted horizon first, because a print makes a slope far more obvious than a phone screen does, and crop away anything at the edges you would not want hanging on a wall.
If the picture was taken on film, scan the negative or the print before anything else. A good scan of a small print usually beats a phone photograph of the same print, since the phone adds its own blur and glare. If you do have to photograph it, lay it flat in even daylight, away from a window's direct sun, and hold the phone square above it so the corners stay true.
The reading, in order
Read the 4 pages in this order, since each one builds on the page before it: Preparing the photograph, The studio styles, Steam scenes in all five styles, and How big it can go.
Ready to see your photograph as art?
What these pages keep concluding
Read all four and the same limit keeps arriving. Everything this site can offer is decided by the file you hand it, because there is nothing else to personalise. That is why the free watermarked preview exists: you see what the styles do to your own photograph before you spend anything, not after.
And after that
The gift comes next. Eight guides, one per kind of present. From spotters to drivers and granddads.