Is it possible to make Alpha mask for shoes in second life using blender

Hello guys , its really pain when i want to make an alpha for the shoe i created in blender and uploaded in Second life, specially the alignment, I guess there must be some easy way to wear the shoe in blender using the SL avatar (which is imported to blender ) and then paint the alpha the area which needed to be invisible it would be much much easier in 3d rather than 2D guessing and trying, any one out there who can help me in this please. Thank you very much.

Moved from “General Forums > Blender and CG Discussions” to “Support > Materials and Textures” (could also fit in Other Software)