Posts: 7,576
Thanks: 59301 in 133 Posts
29 Achievements
View My Journal
Just from the picture I'd say the bone assignments on the upper arm are incorrect, perhaps underweighted. I can't help with fixing it in Blender, though.
Please do not PM me with mod, tutorial, or general modding questions or problems; post them in the thread for the mod or tutorial or post them in the appropriate forum.
Visit my blogs for other Sims content:
Online Sims - general mods for Sims 3
Offline Sims - adult mods for Sims 3 and Sims 4