Interchangable parts, separate meshes or combined?

Yeah, that was what I was thinking I could do, I was just wondering if there might be some performance issues having lot of meshes instead of combined ones. I had a set of fences and because I was still working with it, it was a load of boxes, that wasn’t merged, and when moving around in the viewport of 3DS Max, the framerate dropped, however, after I merged them all into one object, the performance was much better.
So just wanted to make it wouldn’t be a too big of issue.
Btw, as the glass in the windows might or might not be destructible, should it also be a separate part of the mesh, or can you control it with material IDs? Was especially thinking the lower window, as its a movable object.
Thanks so far. :slight_smile: