As promised, Tom Clancy’s Rainbow Six Siege is ... the new mode, Siege X will visually enhance classic Siege maps, outfitting them with new lighting, shadows, and up to 4K textures.

Tom Clancy's Rainbow Six Siege X ... from Black Ops 6. Siege X will also see major visuals enhancements brought to old maps, including new lighting, enhanced shadows, and 4K textures.