I use subtractive morphing regularly... scale object 1000, export,  restore object to 100%, load 1000 scale as morph target. Morph 1000 scale object in external modeler, load result as morph target, dial morph to 1, dial scale morph -1, export result as morph target, dial all to 0, load as morph target, dial to 0.100. Basically a poor mans version of PML or GoZ... a way to eliminate translation errors between apps due to Poser's absurdly tiny native scale.

Confirmed, Bagginsbill's method works Poser 8. It's simply a step in a process I use regularly. Also, OP came into chat asking for a solution to the thread topic before creating the thread here. I linked him to D3d's mirror prop script. Last week.

Shrugs.