What is the best way to support a FDM 3D model?

The best way to support an FDM 3D model is to use soluble (e.g., PVA) or breakaway (e.g., HIPS) supports tailored to overhangs, bridges, or complex geometries—balancing easy removal with part integrity. These supports hold up areas that can’t self-support (like angles >45° or long bridges) to prevent sagging or warping during printing. Soluble supports work for intricate parts (dissolve in water), while breakaway is better for simpler shapes (snaps off without tools). For better results, use a dual-extruder printer for soluble supports if your model has fine details, or adjust support density to 10–20% for basic overhangs to save material and post-processing time.