>>717679172
That requires blending.
You'd create two animations. A pure running animation, and an aiming animation.
When you're just running, play only the running animation.
When you need to aim, you blend, the lower body uses the run animation, the upper body uses the aim animation.
You shouldn't need much code for this, every single engine, even shitty Godot, has this kind of blending setup in design mode.