Tube of choice I am using the work of Tom Hoover
you can find his tubes at PTE
Scrapkit - by Addictive Pleasures.
You can download at dreams-n-digital.
Named "Patty" PTU - HERE
Size 700x700 / transparent
Go to the material and choose a background.
Go to Layers / load save mask / from disk
I use DBV Mask 35