Fxtree: Composite node: Output Size Mode

After transforming effects to use through a composite node (over or math), you can easily crop to the background by setting the Output size node to Use Default Image on the Output tab.

I had been using the psd blend addon but have stopped using it as the "Place Output Image at Origin" is not working consistently and my attempts to use the Output Size Node parameter don't work with the psd blend node. This is unfortunate since the psd blend addon has more compositing options than the math composite (or perhaps they are just easier for me to use as I am used to photoshop).

As promised here is snapshot of the current state of scene 3's fxtree. It is crazy, but it is almost working! I'm having trouble matting some things, I've been attempting to reuse passes into the matte connection of composite nodes and while this is working in most cases, its not working for the fire. I'll need to render a matte for the tiger and canary for the frames when they are in front of the fire.