Add amount option to animation track filter

[eddieataberk]

Describe the project you are working on

A game with complex animations

Describe the problem or limitation you are having in your project

Blending animations per bone looks unrealistic. Because it blends based on bool values. It's either %100 or %0 there is no in-between. In Unreal Engine we can use "Blend Depth" to blend gradually. A similar system would be great for Godot.

Describe the feature / enhancement and how it helps to overcome the problem or limitation

It turns booleans in blend filtering into float values this way we can control how much the bone will be affected by blend animation.

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

If this enhancement will not be used often, can it be worked around with a few lines of script?

No

Is there a reason why this should be core and not an add-on in the asset library?

This is about the core animation system.