New constraint for additive parent-like animation with keyframable offsets

Problem

When using the Child Of constraint in Blender, animators often need to:

combine multiple interactions switch or layer influences keep animation stable when constraints are enabled/disabled

However, the current behavior:

resets transforms when influence changes requires multiple Child Of constraints makes animation difficult to edit and maintain

What is missing

There is currently no constraint that:

continuously updates the child transform based on another object allows this result to be keyframed directly behaves like an additive / multiplier system, not a strict parent

Proposed solution

Introduce a new constraint (separate from Child Of), for example:

"Additive Transform Constraint" (name can vary)

Core behavior

The constraint continuously updates the object’s transform The result is added to the existing transform, not replacing it The influence acts as a multiplier (0 → no effect, 1 → full effect)

Key features

Additive behavior Transform from target is applied as an offset Does not overwrite existing animation Stable transform on disable When constraint is disabled or influence = 0 → object keeps its current position Keyframe-friendly Resulting motion can be baked or directly keyframed No need to rebuild relationships Single constraint instead of multiple No need to stack multiple Child Of constraints Cleaner and more predictable setup

Why this is important

Currently:

animators create multiple Child Of constraints animation becomes hard to control editing keyframes breaks behavior

With this constraint:

animation becomes layered and predictable fewer constraints are needed workflow becomes closer to modern animation systems

Summary

This is not a fix for Child Of, but a new type of constraint:

a continuously updating, additive, keyframe-friendly transform system

Да , идея для поста была написано мной в ручную но была скорректирована и переведена чатом GPT, так как я не владею английским языком

Yes, I wrote the draft for this post by hand, but it was edited and translated using ChatGPT, since I don't speak English.