Thanks,

I'm glad to know that I'm not just missing a fundamental concept here.

If I understand you correctly:
-I split the scene at the boundaries of the effect.
-Render a copy of that scene with the effects in place.
-Put them both on the timeline and dissolve between them

Is there a 'best' way to syncronize these two clips, so that the overlap does not have any glitches?

I will give this a try.

Additionally, I had been considering trying this:

Duplicate the track, and put the effect on one track and vary the opacity, 'blending' to or from the effect. (haven't really tried doing that, Can I change the opacity over time, on a single clip?)

I was also considering:
-Taking the scene, and splitting it in two.
-Applying the filter to one half
-Extending each scene 'half' so that they are now overlapping, and dissolving between the two.


Any comments/suggestions with these options?

Thanks again!

The splitting probably isn't necessary. If you go with the rendering route then you can highlight that section and render "loop region only" without splitting. If you have the cursor at the beginning of that section when you bring the new version in, you can snap it to the cursor. Place the new version on an upper track and apply a simple fade out for the length of the clip.

If you go with your second method then be aware that things can get flakey if you overlap two clips' beginning and ends exactly. It would probably be better if you extened each part to 1 frame away from the other's beginning/end rather than all the way. This will generate the crossfade automatically. If you extend all the way to the ends then the crossfade will probably disappear.