Question to modelers

[Felix-The-Ghost]

I recently rediscovered an AC map I put on hold hoping the newest version of AC would incorporate some of my mapping improvements including mapmodels with negative height offset.

That didn't happen so now I'm hoping someone knows if it is possible to make mapmodels offset in the model itself? Specifically I need the fencepost and wire fence in a way that it can sit on top of a heightfield (half cube)

Thanks in advance for your answers.