Add 3D for clarity
You can explain what you want in writing...For Example:
Build me a duck, using rock, driftwood, shells, and mangrove seeds in such a manner that a center section of rock is supported by the driftwood. The driftwood will be arranged in a triangle and only be supported at one end of each piece. See detailed specification GSR-A1976-p1987(a) sub part z for additional criteria.