Hello,

I was wondering if there is a vex call that uses RAT files as a matte/holdout map?

Example… You want to render a simple element interacting with some complicated object. In order to avoid rendering the expensive object again and again, you render it once as a deep shadow from camera and then you use this map to matte out your other objects.

I've done this in prman, so I'm sure mantra has an equivilant.
https://creditcardsupportx.com/pep-boys-credit-card/ [creditcardsupportx.com]
https://creditcardsupportx.com/rooms-to-go-credit-card/ [creditcardsupportx.com]
https://creditcardsupportx.com/midas-credit-card/ [creditcardsupportx.com]

thanks
jackyjoy

have you tried dsmpixel() [www.sidefx.com] VEX function?