great models.
1)Im pretty sure that ac3d auto scales the textures down when loaded, to save texture space, this of couse is not saved, just for viewing in ac3d.
2)
http://bellsouthpwp.net/a/t/atomicd/plantex_beta2.zip this is a plugin for ac3d, made by dennis, that does some nice stuff with texturing, you might find it useful.
for more info:
http://ac3d.org/forum/viewtopic.php?...er=asc&start=0
3)i dont think so...but i could be wrong.
4)no theres not, but that is a great idea.
good job, and good luck.
--Philip