I sliced and printed a model of flying elephant. Apparently the model is really composed of 3 separate pieces that intersect but are not visible. When sliced and printed the model looked normal at first however after trimming the supports it became obvious that all areas where the wing models intersected with the body model were replaced by a VOID instead of connecting and infill. I've sliced this in PrusaSlicer and Cura and they handle it fine. the model is a sliced as a single contiguous piece.