Hasta La Motion!

I’m also using Vue, and I exported a tiff sequence of a 20 frame animation, along with an alpha channel of that same 20 frame animation as a tiff sequence. The alpha channel is red and black, which I thought was strange since Im used to working with white and black mattes.

Is this red and black matte usable in Nuke? Or would I have to convert it somehow to black and white only?

Does anyone have an example Nuke script I can check out, to do a simple composite of applying a matte to an image?

Im sure I can find a way to apply the matte to the image, and composite over a checkerboard, but Id rather know the correct way to do this.

Just for reference, the animation is a mountain peak, which is supposed to have the top half matted out, so I can composite over a sky.

If anyone can do a mockup of this or something similar, with a checkerboard, that would be great, I just dont know how to get the mountain image to read the matte to get the transparency.

Thanks.