To speed up 3D modeling in Blender, focus on simplifying geometry, optimizing modifiers, adjusting viewport settings, and using small performance fixes.
- **Simplify geometry**: Use the Decimate modifier on non-essential areas (e.g., background props) to cut unnecessary vertices—ideal for high-poly objects like character clothing. - **Optimize modifiers**: Apply modifiers once editing is done to reduce real-time load—no more lag from active subsurf or bevel effects. - **Adjust viewport settings**: Switch to "Solid" draw type or turn off shadows/AO—this lessens GPU strain for busy scenes.
If lag persists, try disabling auto-save temporarily or updating GPU drivers—simple tweaks that often boost speed without harming your model.