Beautiful job, DGM. Congratulations!
Having done the colour renderings of all six Cunard Queens using what seems to be a similar technique to yours, I confirm this is definetely a «handmade job». Although the computer is used as a tool, nothing is automated and every part, every shadow, every reflection has to be manually drawn, put together and coloured - I'd say a bit like a model kit.
Don't want to be too technical here but what software are you using?
My renderings are vector objects made with Free Hand 10. As such there's no limitation in resolution and they could be reproduced on a canvas as large as the original ship if wished.
I'll be interested to see your website when completed.