Mpi FLUX 3 References

FLUX 3 Image Klein reference conditioning with all 10 reference slots exposed at once. Empty slots are dropped and the rest renumbered, so ONE graph covers every combination instead of growing core's Autogrow input per run. Empty means nothing connected or an Mpi loader with block_if_empty OFF (a 1x1 image) - a real black image passes through. Encodes the prompt with `clip`, then core's own ReferenceMultiLatent builds the conditioning. Write the prompt against SLOT numbers - <ref_image_0> means ref_image_0 - and the node rewrites them to what core presents, dropping any tag whose slot is empty. `empty_latent` is core's: the first reference's latent times 0, or core's square 4-channel SD latent when there are none - wrong for FLUX 3, so a text-to-image run takes its latent from EmptyFlux2LatentImage instead.