Boni, I believe what Anthony is referring to is the ability to view the source to edit the files, ie converting to a new format, adding/editing various information about files like smoothing settings, texture coordinates, etc, maybe even writing an application that will convert models to and from the bryce format. If I remember correctly, Anothy has written a few utiliies for Poser already(generating ufo's, weapons, etc) that have been extremly useful to alot of the Poser Community