Compositing often also includes scaling, retouching and colour correction of images. Masterclasses take the reader through tasks such as photo retouching, design techniques, and creating movies. Version 19 offered Intelligent Skin Smoothing, Enhanced Hair Retouching, Expression Sliders and Interactive Tutorials. The pre-print photo retouching was done by Graphic Art Service, based in Marietta, Georgia. Joseph Stalin made use of photo retouching for propaganda purposes. Her cover artwork uses heavy photo retouching to produce unnatural, hyperreal versions of herself. CinePaint is an open source computer program for painting and retouching bitmap frames of films. The majority of staff are engaged in post-production such as retouching and keywording. In-painting and retouching materials for scrolls and screens is not reversible. Calotyping also introduced the ability for a printmaker to alter the resulting image through retouching. Cooper also notes that the painting has been badly damaged by over-cleaning and retouching. Another tactic to promote body positivity has been to protest against photo retouching. Procter & Gamble admitted to minor retouching and replaced the image. Hand-colouring should be distinguished from "tinting", "toning", "retouching", and "crystoleum". Most of the paint was well adhered and required little retouching.