Submatrixs and Masking

    Mar 16 2012 | 6:54 pm
    I'm unpacking a matrix and trying to change the alpha channel, like by substituting a different mask. I'm really having a hard time doing packing the new alpha channel into a new matrix. What's the deal? Any recommendations?
    Also, I need help tracking and isolating a face from the face library and then putting it into a sub matrix so that it can be indepently manipulated before it gets repacked into the matrix. Do you think jit.change is good for this?