Spotlight, apparent and reverse

I have a spot of light that is key to move, axes XYZ and touch-ups to pointofinterest, around 3 axis again.

I want to another place for 'point of interest' relatives and X, Y, z order (I separated them), but not all reverse. I guess that the expressions are the way to go, but I have very little knowledge of what they are capable.

If you imagine a physical spotlight, I essentially want to stick another to the back of it and direct it in the other direction, regardless of where the original Spotlight goes.

I have not found someone online who did this, but if there are resources or plugins that could help me, please point me in the right direction.

I have a few questioins myself.

You say you want another place to the center of interest of the parents but everything reversed. It makes no sense to me. The point of interest is where the place is indicated and not having opposite No. There is a line between the position of the projector and the point of interest. That's the way you would with an expression, but there is a much easier way.

Here are the steps. Create 1 spot. Set the point of interest on the center of the model for X and there then the Z value something like 500.  Set the X position and Y of point 1 in the center of the model and Z to 0. What you want to do is to finish with the values X and Y position and the point of interest to be the same and the Z value offset to a reasonable distance.

Now duplicate 1 spot, add a null 3D. Copy the value of position for spot 1 to null. Spot 1 parents to null. Rotate 180º null in y. Parent spot 2 to null. Animate the value null.

Tags: After Effects

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