Skybox - Skyportal - clipping issue?

[Guest KENNITHH]

So I'm trying this _skybox function again that Ydnar added to q3map2 which allows you to have a skyportal/3D skybox.

 

But I stumbled on this issue: http://imgur.com/a/uRBuH : The distance seems to be clipped like cubic clipping in gtkradiant

I've tried increasing farplanedist, distancecull and chopsize but none have affect to this. I did notice that JKA has the same issue but it can look further than SoF2.

 

Any ideas on a fix?

 

(this feature: http://forums.warchest.com/showthread.php/5053-Q3Map-2-5-11-feature-skyboxen)