When you duplicate a composition in After Effects without a specialized script, you are merely creating a shell. If that composition contains pre-comps—nested compositions inside the main timeline—the native duplicate does not create new copies of those pre-comps. Instead, it maintains references to the original pre-comps.
At its core, True Comp Duplicator does what After Effects cannot do natively: it creates a "deep copy." AEScripts True Comp Duplicator v3.9.11 for Afte...
: Highly stable and compatible with CS6 through the latest versions of After Effects. When you duplicate a composition in After Effects
Duplicate the main comp three times → manually locate 15 pre-comps → duplicate each one → relink every reference. Estimated time: 45 minutes. At its core, True Comp Duplicator does what
This creates a catastrophic workflow issue known as the "Parent-Child" conflict. Imagine you have duplicated a composition to create a variation (e.g., changing the text from "Version A" to "Version B"). You dive into your pre-comp to change the text, only to realize that you have also changed the text in the original "Version A" composition. Because both the original and the duplicate are referencing the same internal pre-comp file, editing one edits them all.