Is there a way to turn off anti-aliasing in firefly? There used to be a way to do it in the old Poser 4 render but I can't seem to find a way to do it in Firefly renders.

Thanks.

I hadn't noticed that, but you're right.  The choice is gone.

Here's a quickie script that brings back the choice (turns anti-alias OFF):

import poser
scene=poser.Scene()
scene.SetRenderAntiAliased(0)

For a script that restores the Anti-alias, change the 0 in the last line to 1 and resave under a different name.

I tried it in P9; not convinced it's actually doing anything, but it doesn't give an error. 

Your aliasage may vary.

I think turning the 'Pixel Samples' value down to one in the Render Settings turns off anti-aliasing (I could be wrong).

Yup, that has the same effect.  It doesn't seem to save as much time as the action of turning off AA in P4, but maybe I'm misremembering.