PBRReal Blood Demon is a set of physically based materials for the Dark Fantasy Addons for Genesis 3 Females. (https://www.daz3d.com/dark-fantasy-add-ons-for-genesis-3-female-s)These Materials simulate real world materials when used with DAZ Studio IRAY and through that can produce photorealistic results.
The Dark Fantasy Addons that DAZ provides in several bundles come with outdated textures that look bad when combined with realistic light. PBReal Blood Demon gives you an alternative Material for: