I'm not afraid to play around with hacking the files. In the past, I've even written utilities to do the job if it is complicated. But I haven't  yet found a hack that would change one node while leaving another node unchanged.

It's really that I haven't yet found out how to hack a materials file so that any given node would remain the same as it was when I double-click on the hacked materials file. If I leave out a node in the materials file, Poser deletes that node when I apply the mt5 file. If I just delete the file reference in a mt5 or mc6 file, Poser inserts "none" into the file name for the Image_File node.

What I would like is to find a way that I could make a materials file so that the texture image file would change, but the transparency image file would remain the same as it already was in memory. And vice versa: make a materials file so that the texture image file would remain the same as it already was in memory, but the transparency image file would change.

Any ideas?