V1, V2, and Judy can all use the same textures; although Judy was mapped to come close, she's not exact. Steph 1 can use the same textures as Mike 1, 2 v3, S3, and she freak can use the same textures -- haven't checked david. M3 & Freak use the same textures. Posette uses her own textures. In fact, excepting the newest figures, all of the poser folks use different textures. Posette still has more textures available for her for free than any other figure -- and some of them are better than many of the expensive ones available for v3. There's not much morph sharing outside of the gen 3 mil figures - and those are not stable, producing different results. There are hybrids out there, but they are intermediate use type stuff. Conforming clothing is always figure specific, as it is dependent on the boning system for function. However, any figures which share the same boning system can share the same clothes, assuming alterations for body shape. V1/2 ad M1/2 can share clothing like that. That's about the only one for certain. Furrette can wear Posette clothing though :)

thou and I, my friend, can, in the most flunkey world, make, each of us, one non-flunkey, one hero, if we like: that will be two heroes to begin with. (Carlyle)