Separate brush settings for MixBrush

[amyren]

For MixBrush there is only one setting for the mixing level.
Would it be possible to have the option to set the transparency level seperately for each of the brushes?

[airsoftsoftwair]

I think this could easily be implemented in a Hollywood script by first reducing the alpha channel values using ReduceAlphaChannel() and then using MixBrush() or something.