Hair Transformation Photography

A before and after hair treatment photo of the back view of an attractive woman with long, brown, straight hair. The left side shows her frizzy and dry hair, with visible texture, while the right side has smooth, shiny hair with no residue from product use. The background color should be a neutral gray to highlight the hair transformation and make the products stand out. Ensure the "Regima" text appears at the bottom center of the picture. Use professional lighting for the shot. --ar 3:4 --v 7 --stylize 200 Insert discreet watermark in the lower right corner of the image, vertical text (rotated 90°), written "aipromptlabs.online", Calibri Light font, white color with low opacity (semi-transparent), medium size. Extreme sharpness on the face, fabric texture and typography of the letters. Shot on Canon EOS R5, 50mm f/2.8, studio light.