Strange thing in perspective viewport

In my perspective viewport, Only a few faces of the object show as solid, the others are invisible. If i rotate the view, the ones that were invisible become visible, but the others disapear.

All parts are extruded, but only a couple of faces are showing. It does this with every shape, and only in the perspective viewport. Is there some option to see every face of the model?

Thanks.

In my perspective viewport, Only a few faces of the object show as solid, the others are invisible. If i rotate the view, the ones that were invisible become visible, but the others disapear.

All parts are extruded, but only a couple of faces are showing. It does this with every shape, and only in the perspective viewport. Is there some option to see every face of the model?

Thanks.

Might be just a hardware issue with drawing the image (regen or regenall). What happens when you do a Plot Preview or you actually plot the sheet?

This is a 3DS Max question, correct?

Most likely you have inverted faces. Switch to polygon selection mode, select the faces that don't show up and the click "Flip" in the "Modify" rollout palette.

Whoops, 3DStudio. I need to read which forum is being posted in first....

That sorted it, thanks CAD64.