This content has been marked as final. Show 5 replies
You could do the key then render it out as an intermediate clip - Lossless with an alpha channel.
I did that, but it still colors all the alpha red when I apply the effect.
Got it to work. I made a render with the effect applied, then I put that in the timeline and I used "Set Matte" and set the "Take matte from layer" to the alpha channel from the lossless alpha channel clip I made. Kind of a convoluted way of doing it. Anyone know an easier way?
Some effects will overwrite the Alpha channel. In that case the procedures you choose are correct, if you want to keep the layer count low. Still, you may wish to check the layer's internal blendmode controls just to make sure. For effects like Colorama, you can also explicitly disable Alpha processing, so the source transparency remains intact. You could of course also use the Alpha Matte or Stencil Alpha modes to do the cutout using duplicates of the source layer.
Why not apply the Keylight effect in one comp and then place that comp in another where you apply the infrared effect? Rendering out an intermediate video is just a waste of disk space.
It's called "pre-composing."
- Jonas Hummelstrand