By default, all animations are composed of a sequence of images stored in 192×192 cells. This means that you can effectively use images of that size comfortably. Of course, you can try to coordinate multiple cells together to form a larger image, but if you have a very large image it is no longer feasible.
This script allows you to convert an animation sheet into one large image rather than separate cells, allowing you to easily create large animations.
Script: download here
Place this script below Materials and above Main
In the configuration section, type in the ID’s of all animations that should use the full-sized sheet. Then set up your animation as usual.
When an animation is full-sized, the second picture will be treated as a full sheet, while the first picture is treated normally.
Keep in mind that the editor only shows the top-left corner.