Thanks Fredrik! The simple answer to your question is 'yes'. I wish I could talk meaningfully about the creation process but my brother handles all that. Basically the machine 'prints' layers of resin that are hardened by a UV beam. Kinda like pixels on a screen. Many factors influence the resolution outcome, including the quality of the printer, the type of resin, the design pattern, software settings and, as you mention, how an object is positioned. This I think is one reason why 3D parts are commonly printed diagonally, which is also why support sprues are needed. I'm sure others here could explain it better than me. The graining sands off quite easily, but these are too tiny for that.