Have hit severed heads with a considerable array of bricks... or at least as considerable an array as I could be bothered with.
Getting them to stop sounding like burning torches, easy enough, getting them to drip emitter blood, easy enough, getting strands of danglymesh gore to behave, easy enough...
But there's still the ludicrous fact that they change size if characters of different sizes hold them. Somebody's head should not change size just because you cut it off and hand it to your friend who's three feet shorter than you...
As far as I know, other than going through the appearance 2da and resetting EVERY Creature's "weaponscale" setting to be identical - which would be more than slightly impractical for obvious reasons - there's just no way to resolve this.
With a beer mug, say, fine, different sizes of cup are known to exist, daggers, whatever, they can be different sizes. I just can't get over my irritation at HEADS THAT CHANGE SIZE...
So I threw them all away and stamped on them and called them horrible names. My feeling is that, at least by means of using the baseitems 2da and making them holdable items, Biological Objects of Manifestly Fixed Proportions cannot be done satisfactorily in NWN.
And I don't really like to put out content I'm in no way happy with at all. So, sorry, but no heads... Not that this should cripple anyone with absolutel horror since a stack of heads to wave about are hardly the most blisteringly USEFUL things anyway.
(I'll probably put them all on sharp sticks and just make them Placeables some time...)
Sorry.