ios man

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

Hello,

What I'm looking for is similar to Nuke's O-flow tool (where a 2d grid of motion vectors are generated for an image sequence, based on image information).

I wonder if similar could be possible using existing Houdini tools (microsolvers?) for volumes? Say, I have a sequence of 3d volumes (scalar/density), and I'd like to generate a motion vector volume for them, by analyzing the difference between the volume on the current and the next frame.

I hope I'm making sense here

thanks
iosman