Slot in the cube-array texture (0..MAX_PROBES - 1).
Probe world position (cube capture center).
0 = sky, 1 = sky + clouds, 2 = scene.
Six face view-projection matrices, +X,-X,+Y,-Y,+Z,-Z (same order as PointLight).
OptionalmeshesMesh draws used only when contentMode === 2.
One probe's bake request for a single frame. The manager fills these, one per probe that needs an update this frame, and passes them to the capture pass via ReflectionProbeCapturePass.setBakeRequests.