Stop placing objects in your 3ds Max scene manually by moving the gizmo. That way you can waste a lot of time and it is not accurate. Instead try the following: 1. Select the object and edit its pivot point to place it at its base. 2. At the top in the main tool bar select the option: "Select and Place" 3. That's it! Now you just have to place your objects where you prefer since it adapts perfectly to the surface you lean on. Save this post so you can review it when you are in front of the progr