-[ULTR] -Invisible, only visible on heat view (like on real life) -Radioactives section -Steam shader -Temp-doesn't really matter, it wouldn't change temps, like INSL -Functionality-Hurts stickman, makes glow glow in any pressure.
-[ULTR] - visible but purple glow -radioactives -steam shader -is not hot itself but heats up other objects -makes other elements give off neutrons ( minimal)