JCM = Joint Controlled Morph

JCM's are generally corrective morphs that activate when a certain joint is bent a certain way.  Anastasia has some that Alyson2 base does not.

In most cases the clothing should fit, but there might be some pokethrough in places like elbows and shuolders when joints are bent.

 

The solution is ... more JCMs lol or fix morphs that can be manually applied by the user. I prefer manual solutions, partly because I'm terrible at programming, but also because it gives the user more control.

Lyrra