This is a bit long-winded, but I needed to explain a couple of things.

I'm updating a character, so firstly I moved the old texture folder out of Runtime to the Poser root. I created a new folder with the same name as the old one in Runtime:Textures, and moved my updated textures there.

My MAT file, which references the textures, hasn't changed or been moved. Apply the MAT and render - and the image appears with the old textures.

OK: I know where I've gone wrong. The MATs point to

":Rosie:Rosie_V3_Body.jpg"

instead of "Runtime:Textures:Rosie:Rosie_V3_Body.jpg"

and so on, and because of this, Poser looks for the first file with that name it finds. I've learned that since I did the original figure. But, unless i've missed something, this means that Poser has looked for, found and used files that are outside of its own runtime structure.

Now - assuming you've not lost the will to live... other than being an object lesson in referencing files properly, has anyone else had this, and is it anything other than a minor Poser quirk?