Houdini | Capture Layer Paint as masking

Hi
I'm Pedro Alpiarça dos Santos, increasing the node love at Pixel Fondue, for now with some Houdini videos. I love to build operations that I can later play with its parameters and since I like to trace the algorithms live, nodes are perfect for it. Hopefully I'm able to share that enthusiasm with you. Let me know in the comments to the video what sort of things you would like to see covered.

Using bone weight painting in Houdini to mask multiple inputs. Scene files: http://jmp.sh/sHlsFB7
Let me know what you used it for.