I've tracked a shot in and set up the scene in Nuke, I've then used the smae camera in Houdini for a snow man that I've created. Upon importing the exr sequence into Nuke, I now need to introduce a mask to the scene as the 'snow man' is supposedly outside, meaning I need to mask the window frames.
The problem is, I need to mask a 2D element, in a 3D scene.
Any ideas? (Hopefully this makes some kind of sense).
Thanks in advance.