Hi Billabong, Do you have Options > View > "Hidden edges on selected only" turned on?

If so then they'll only display on selected objects.

Another possible explanation is if they are set to be completely transparent.

What do you have in moi.ini under

[Hidden lines]
HiddenLineOpacity=34

- Michael

Hey Michael,
Selected is turned off and here is a screengrab of the .ini

-B

Hi Billabong, maybe it has to do with that particular model being thin walled throughout.

What happens if you make a box, does it work on the box if you set View > Display hidden lines checkbox to be on?

- Michael

I think your right. Another thing I noticed is that it only looks that way from inside the object. The outside of the object looks the way it should. Odd, but my mistake. Sorry.