Check out a nice free script for 3ds Max by Andreas Meissner.
Hover with your cursor over the clean-buttons to see tooltips for further information.
Installation:
- Drag and drop the file “install macro.ms” into your scene
- You can create a toolbar button by using the macro under: Customize > Category: “# Scripts” > Cleaner
Tips:
- If you look inside the folder …/Cleaner/clean/deactivated/… you can find further functions. To use them you need to move them into the folder …/Cleaner/clean/…
- Before cleaning dublicate objects, you should select and isolate these objects to check if they are really dublicates!
- The “Texture Filtering” will speed up your rendering cause textures like leafes, flowers and ivys will be set to filtering:none, but this will change the look of your rendering, use with care!