Skylum continues to tease impressive AI features that are coming to its Luminar 4 software this fall. First we got AI Sky Replace, then AI Structure, and now the software company is showing off two impressive new AI-powered tools that will take out blemishes, whiten teeth, adjust facial features, and more: AI Skin Enhancer and AI Portrait Enhancer. AI Skin Enhancer focuses on removing imperfections and blemishes in the skin without over-smoothing or otherwise removing all of the character from…