Some of the to-dos

- Implemented Animation parameters for A_ChangeModel
- Made a modeldef flag to treat additional model indices as just attachments, meaning they will use armature data from index 0
- Fixed an issue with A_ChangeModel where generated indices lower than smf frame amounts could not actually generate anything

src/playsim/p_mobj.cpp

@@ -1370,6 +1370,7 @@ void DActorModelData::Serialize(FSerializer& arc)
 		("modelIDs", modelIDs)
 		("skinIDs", skinIDs)
 		("surfaceSkinIDs", surfaceSkinIDs)
+		("animationIDs", animationIDs)
 		("modelFrameGenerators", modelFrameGenerators)
 		("hasModel", hasModel);
 }