Ensure your 3D model (likely an .obj or .stl file) is "water-tight" and has a relatively low polygon count. High-poly models are extremely difficult to fold by hand.

Software like Blender or Rhino 3D can be used to simplify or "decimate" a complex mesh before export. 2. Unfold the Model (UV Unwrapping)

: Before folding, lightly run a blunt edge (like a dried-out ballpoint pen) along the fold lines. This creates a "score" that allows the paper to bend perfectly.