Hi all, I'm trying to compose a distant rocket launching into the sky in the background of a mountain shot that I have. It's handheld footage so it's a little shakey, so I created a null layer and motion tracked the footage with the null as the target. Then, I created a light layer (I eventually want to use this for a smoke trail in particular) that I want to have keyframed so it goes from the mountaintop -> up to the sky, then parent it to the null layer. With a 2d object, this method works perfectly.
Problem is I *think* the z-space introduced by the light layer since it's a 3d object doesn't allow it to parent the way I want it to to the null's x-positioning, and I'm getting a light that goes from the mountaintop to the sky but does not mimic the null layers tracking positioning. Instead it goes from mountaintop -> sky while shifting side to side.
How should I be approaching this? My brain is starting to melt. I think a light layer is necessary because all the other 2d layers I've tried don't allow particular to leave trails. I'm assuming I need some sort of expression that'll allow the 3d light to parent to a position in 2d space? I don't know. My brain is fried now after fiddling with this for hours, very frustrating -_-