One, its says - couldn't find. Perhaps these paticular models are valid for sh only, and you are putting them in aa ?
Some models, depending on which ones they are, need to have some sort of clip put around them, or fitted to them, to keep player from walking through'm.
All of the models are from my AA game I don't have spearhead and I remember seeing then in the game. I caulked some of them but it is realy hard and a pian to caulk a sherman tank.
Okay now I get it. Dang i'v been dence I figured that out for myself using the stone, wood, and other such clips I just didn't realise there were vehicle clips.
The sherman tank ("static_vehicle_allied_tank-sherman") ought to be solid though... Or did u use "vehicle_allied_tank-sherman", the non-static version?! In fact, models with a corresponding map file in Pak0.pk3/models/static (or wherever their tik file is) already have their set of clip brushes.
For models that don't have one, u can make ur own map file and save it in a custom pk3 in a similar way. This way u wouldnt have to clip this model again and again and also the clips are rotated and scaled like the model itself