What is the best way to simplify a triangles 3D model?

The best way to simplify a triangle-based 3D model is using vertex decimation or edge collapse algorithms—they reduce triangle count while preserving key shape details. Vertex decimation removes less critical vertices and adjusts adjacent triangles; edge collapse merges connected vertices. Both balance detail loss with model integrity, ideal for games (improves performance) or 3D printing (faster slicing). For beginners, try Blender’s Decimate modifier or Meshlab’s Simplification filter—these tools let you visually adjust target triangle counts to strike the right balance between simplicity and essential detail.