I tested the latest Rex facial rig setup by posing and transitioning to different emotions. Simply to check if we can hit the desired poses, addressing appearing issues to the rigging department and explore personality of Rex in these poses.

Recreated the alternate 'square' teeth shape key on Rex's retopologized teeth following the sculpt. Recreated 'mouth_uu' shape key as test on Rex's retopologized head mesh following the sculpt. Started on Ellie and completed retopology on head, eyebrows, and eyelashes.

Minor tweaks to the eye rig, improvements and documentation for CloudRig's Troubleshooting module and bug reporting, update the Sprite mesh to the latest one and improve the behaviour of the hat, and a happy Christmas!