Hi Edward,
Thank you for the tip of using absolute color, I didn't think about it. Though, the issue isn't solved yet, and I can't understand why.
Here's what I did (and checked 10 times) :
1/ A composition whose height is exactly the height of 1 range of numbers. A photography inside (the anchor point unchanged).
2/ A duplicate of this composition, and a change of scale of the photo (100/-100) to reverse it.
3/ The 2 compositions are imported into the main composition, where is my layer with ProAnimator applied.
4/ Into the Layer Maps list, I give the information : Layer Map 4 = normal outlines comp. ; Layer Map 5 = reversed outlines comp.
5/ Into Pro Animator, I apply the right layer map at the right place.
And absolute Colors for both.
>>> what happens ?
That's not a mirror. What would I have forgot ???
Thanks for your help,