Using your preferred paint program, open the texture files you are using for the dragon. Select each one in turn and resize the image to 50%, or whatever size you prefer. Save the altered files with a new name, so as to preserve your original textures. Once you have done this, open the dragon again in Poser and change the texture settings to point to your new files. If you are using Poser 4 you will have to re-create the .bum files.

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.