Procedural rendering missing layering

[BitBarrel]

Procedural rendering is missing the ability to insert content in between object layers in an existing scene.

I suggest adding a feature to the API that allows you to specify an object (by name) from the existing object hierarchy under which the procedural content will be rendered.

[damzobridge]

The recommended way to do this is to use the RivePanel, RiveWidget, and ProceduralRiveWidget components which are available as of v0.3.2.

A Rive panel can display multiple Widgets, so you can layer RiveWidgets and ProceduralRiveWidgets within a RivePanel hierarchy to control where procedural content is rendered within the same texture.