I'm just starting to teach myself Motion.
I'm linking to this little clip of the same motion file in a FC sequence. The second being over a slug with a negative filter on it. At the end of the text there is a bit of a jump where the text loses its glow. This doesn't happen in the first clip. Can someone tell me why this happens and what I can do to fix it, if there is a fix?
It looks to me as if you also have an outline or shadow that is disappearing for whatever reason. You'll want to check those parameters and/or the keyframe editor. And I'd say the reason you're not seeing it with the first one is simply because the background is black.