Autodesk 12812-051462-9011 User Guide 3 - Page 2622

Try using the command that was giving you trouble and see if it works correctly now. Problems Caused by Unit Settings The unit settings of a model can often get you into trouble. Understanding some of the common problems can help you avoid them. This section addresses the two most common problems that modelers encounter. Problems and Resolutions Objects Disappear When the Camera Gets Close This situation can happen when you model things on a very tiny scale and then have to get very close to them in a Camera or Perspective viewport. Architectural walkthrough animations are notorious for this kind of behavior. You've got a camera moving along a path and at some point it gets too close to a wall and you're suddenly able to see through to a room on the other side. NOTE This problem is quite common for designers working with the metric system when you want to use real world metric units and you change the System Unit Scale to 1 unit=1 meter. You don't have to change the System Unit Scale to metric to work in Metric units; just change the units. There are two solutions that often fix this problem. Turn on the manual viewport clipping: You can turn on the manual viewport clipping and adjust it to see the entire object. Viewport clipping has a Near and Far range setting, if a camera gets closer to an object than the Near Clip value, you will see through that object. Likewise, objects that are located beyond the Far Clip value, will be invisible to the camera. 1 Open the problematic scene and select the camera. 2 In the Parameters rollout > Clipping Planes group, turn on Clip Manually. 3 Adjust the Near or Far Clip value, or both. When you can see the object again, your clipping plane is set properly. Problems Caused by Unit Settings | 7877