[Feature Request] Background Image Transform and Tracker/Expression Binding

[helloar14]

Validations

• I have checked for similar feature requests and could not find any.
• I have made sure this is not an already-existing feature.

Description

Adding background image transform will grant more options to the scene, and being able to bind those transform to expression bindings will be a nice added option. This for example can be used for some kind of background parallax effect combined with the character moving left and right, which is already common in terms of rigging features.

Suggested solution

• Add input fields to change background scale and position.
• Add tracking/expression bindings to background scale and position for a more dynamic change.

Alternative solution

No response

Additional Context

No response