Custome model in SFM acts weird

[Left_4_Pills]

So my friend compiled parts of a model that i will use later for SFM's but it tends to be shy and dissapear whenever I look at it in differnet angles of the camera
[IMG]http://i.imgur.com/NoG3V.jpg[/IMG]
He made the model replace the cadavers cranium and the steel jaw.
Can anyone help?

[MaxOfS2D]

remove any hbox lines from the QC

[Left_4_Pills]

[QUOTE=MaxOfS2D;39066209]remove any hbox lines from the QC[/QUOTE]

Very useful, thanks.