Can anyone explain what the NiZBufferProperty does within a MW nif?

http://niftools.sourceforge.net/doc/nif/NiZBufferProperty.html Followed up with http://en.wikipedia.org/wiki/Z-buffering. In short, it controls the z-buffer and is pretty handy when there are overlapping meshes with alpha-mapped textures.

Thanks M.D. but how does this relate to a MW model? If a model has this block (NiZBufferProperty) - does the game display system use it? According to nif tools - there are only a couple of attributes available to a 4.0.0.2 model - and the only one that has much meaning is the Flags attribute. If this helps cut down display/update screen time - then shouldn't all models have this block set?

To be honest, I have not done a lot of experimentation with it. But the times I have used it it seems to help out alpha-mapped meshes in a hit and miss fashion. But it certainly never makes things worse.

Maybe they should all use it.

Sorry I can't offer much more. Maybe someone like vurt has done more experimentation with it than I.