Compositor backdrop won't show the current composite result

Support Compositing and Post Processing
1

Hey folks. Working through the Match Track Blend DVD and hitting every stupid branch on the way down.

I’m just about finished with the Two Point Track video (https://www.youtube.com/watch?v=ewq-rZEdhpg), only with some depressingly crappy luminance masking. I was trying to fix this when I realised that the Compositor backdrop was only showing the video footage, not the combined image (as seen in the image/render port, bottom left).

Does anybody know what I should be doing here? I should point out that I’m using Cycles instead of the Blender Internal (as in the video sequence) - as I’m trying to migrate most of my skills from Internal.

Many thanks in advance,

–Rev

matchTrackBlenderProblem02001Rev.jpg2300×776 201 KB

(On the left, my current setup. On the right, a clip from the Match Track Blend tutorial)

2

Yeah Blender’s VSE default output is black if there is no active strip available to render. You could just stick a scene strip in there, but I try to keep VSE and compositor scenes separate as there can be issues with performance.

That is if you have complex 3D or compositing as well as a VSE in one scene, then the VSE will become sluggish as it won’t ignore all the other stuff.