DesignConcept.txt

AnimationOverrides!animID_override.tlsa
A tlsa file containing single animation entry. The overriding animation requires a custom ID so as to not completely override the old animation and to avoid ID conflicts. For most cases the TLSA filename shouldn't matter as the game should read all of them anyway. Same tlsa can also contain multiple animation entries with their own IDs. In fact that is also how Spore and GA handle their own TLSA entries as well, both have most of their animations inside the same file.

AnimationOverrides!animID_original.prop
Property list processed by the Animation Overrider mod to replace the animation being overridden. Its instance ID must be the same as the animation ID you want to override. The file can contain the following properties as an example:

uint32 overrideWith # The new animation ID that will be loaded instead. It can either be an existing vanilla animation or one added with a mod.
bool requireAvatar # Is this animation something you only intend the avatar to have?
uint32s modes # GameMode IDs this override should only activate in. When not in prop file, the animation will be overridden globally.
	hash(mode1)
	hash(mode2)
end
int32 forceChoice # Force a specific animation choice index within the new animation ID.