Because of the inherent nature of Creature's Mesh deformation framework, swapping raw images onto region meshes in Creature might result in incorrect sizes/distortion. This is because sprite swapping in Creature involves a complicated process of mapping a rectangular image onto a non-regular mesh region. This is a non-trivial image mapping transform.
This can be fixed with the new Sprite Sizer script provided on the CreatureTools Github Page: https://github.com/kestrelm/CreatureTools
The Sprite Sizer Tool essentially reads in images from a provided input folder, resizes those images to the correct aspect ratio and then outputs them back out into a provided destination folder.
The full documentation on how to install and run the tool is now up:
http://www.kestrelmoon.com/creaturedocs ... nager.html
A video tutorial on how to run the tool is also online:
Video: https://youtu.be/PHbIPksB2aQ
The tool itself lives in the CreatureTools Github Repository:
https://github.com/kestrelm/CreatureTools
Cheers,
Chong