The 3D model needs to be output as an STL file (Standard Tessellation Language) That's loaded into the "slicing software" that typically comes with your 3D printer, such as Chitubox, that slices the model into layers and adds a support structure for printing.
The model has to be made with printing in mind. For instance, if it's a tube sort of structure, an inner surface must be modeled, not just an outer surface.
The deck box shown is hollow to save resin, make it lighter, and I was afraid a solid block would crack over time. I had to model the inside surface AND connect that to the outside surface or the printing would fail - a resin printer can't print nothing.
