Comment 28 for bug 1121982

I really don't get on with the script.
At the moment i just try to understand if it is possible to pack animations which different size. For simpliticity i am working with the babarian barrier, which has only 3 animations:
  barrier_i => 79x76px
  barrier_u => 76x76px
  barrier_b => 76x76px

So, while it is not possible to base u/b on i or i on b/u because of the different size it should be able to base u on b and pack then together with i?
=> but pack_animations( (('barrier_i_',), ('barrier_b_', 'barrier_u_')) ) does not work

So it is necessary that all animations/pics in one directory have to be the same size?