Swaps heavy high-poly components (e.g., highly detailed 3D trees) with lightweight 2D proxies while modeling. Switch back to high-poly mode right before sending the file to your rendering engine.
This tool is a lifesaver for architectural visualization. You can select a forest of trees or a group of furniture items and randomly scale or rotate them in one click, creating a natural, non-repetitive look. Sketchup Plugin Jhs Powerbar