A technical part disappears inside a machine and is judged on what it does. A prop, a set piece or a fair model gets looked at and handled, often up close and often under lights. There, something else counts: the shape, the surface and the seams.
Almost always such a piece is also bigger than one build plate. So it is built up in sections without losing dimensions, bonded into one piece, and then worked back until you cannot see where the parts meet. We use ASA for this, a material that can be filled with its own solvent and then sanded smooth.