Incomplete camera information at scene init

[AstraLuma]

When a scene is initialized, its Camera has not received information from the renderer yet, making some forms of pinning.

This is true whether it's the initial scene, a stacked scene, or replacing the initial scene.

[AstraLuma]

I need to spend some time developing an example for this, because it doesn't show up in day-to-day and I have no idea why.

[AstraLuma]

Ok, yeah, my grid test doesn't fill the right way on non-default resolutions (as printed).