What are the steps to reduce a normal maps 3D model for beginners?

For beginners, reducing a normal map 3D model involves simplifying the model’s geometry first, then updating the normal map to match the lower-poly version. Start with a retopology tool (like Blender’s Decimate modifier) to lower polygon count while keeping key shapes. Next, bake the original high-poly details onto the low-poly model—this transfers normal map info without increasing file size. Finally, test the low-poly model with the baked normal map to ensure details still look correct. In Blender, try the Decimate modifier’s “Collapse” mode (stay under 50% for minor reductions) and bake normals in “Tangent” space—this is an easy way to practice without complex steps.