Cycle through vertexshaders and see if you can find it. We wont be removing the texture that clips (at the top) unless we have to. I cant gaurantee it will work but it will require effort on your part. I will see if perhaps together we can find a solution. Then there are the problems with fixing a game, updates that break fixes, DLC, etc. Lots of time goes into fixing each issue and the amount of people who would benefit are just too small. I know helix wouldnt fix it for the mod, sorry.
I havent actually played X3 since Im not really into those types of games but perhaps I can help.
(This is not helix, helix has been busy with work so I will be answering)