A portrait can start to look unnatural even before the overall edit seems glaringly incorrect. A single additional pass with the healing brush, a patch of blur beside the cheek, or a duplicated clone spot next to the nose is enough to flatten the skin, even if the color and contrast look right. Natural skin texture is not an enemy to eliminate; in fact, it’s one of the primary factors that maintains a portrait’s realism, especially for art retouching, where the objective is typically a cleaner picture, not a porcelain doll look.
Before using a brush to clean a photo with the healing tool, view it at two different zoom levels. Examine it at a close-up range to view pores, small skin blemishes, stray hair, and uneven markings. Then, zoom back out to see whether those details still seem distracting. A small spot in a close-up can seem massive, but you can lose that impression when seeing the full image. This initial viewing will help you realize that not every skin pore demands correction. Deciding exactly what needs a cleanup and what can be left alone can make retouching much more calm and precise.
Start by creating a separate layer to retouch or use any non-destructive setup that keeps the original file intact. Retouching the face for cleanup requires small corrections to undo a previous adjustment. You may think you have finished cleaning a skin blemish, and then compare it with the original. That area may seem too smooth after all. Having a flexible approach allows you to adjust the opacity, undo a section, or rework the area without having to restart. This will allow you to make small, targeted changes.
For spot cleaning, use a brush size that is just a little bit bigger than the distraction you’re targeting. If your brush is too big, you’re bringing in colors and textures nearby that don’t belong there. This is how those cloudy, fuzzy patches appear on cheeks, forehead, and the under-eye area. Go around and clean one spot, and step away from the computer a minute and review whether that new grain still has the same look as other grain. Your cleanup should not draw attention to itself; it just shouldn’t take your viewer away.
The clone stamp tool requires extra attention because repeating texture can be hard to spot while looking at your work closely. If you go to one small section repeatedly to find a texture, the skin will eventually look like it has repeating patterns. Constantly change your sample point, especially if you’re moving from one part of the face to another. Areas of the forehead, cheekbones, chin, and nose all feature different patterns of lighting, and shadows. Texture that looks correct in one location likely won’t look right in another location. You have to take texture as well as tone into account when cleaning.
Try to clean a small section of your portrait, perhaps the cheek, or the corner of the chin area, and only remove the most visible spots for a couple of minutes. Then, turn off and on your retouch layer. Does the skin look as though it has pores and has natural-looking tonal transition? If your clean section resembles some kind of sticker you just put on the top of the face, reduce your brush size or delete part of your cleanup. Remember that you don’t want your retouch to look as if you have retouched; the idea is for the retouch to not look as if you’ve retouched at all.
Both color and sharpness affect a skin texture. Over-saturation can make your cleansed areas appear redder, and over-sharpening can make your pores or small blemishes seem rougher. However, over-blurring can make them seem too soft and can make the face seem too flat. Make sure you check your cleansed highlights, shadows, and midtones before applying your final sharpness. Sometimes, a less-than-perfect retouch is actually better than an overly aggressive edit.
You are doing it right if your viewer notices your subject’s emotions, lighting and mood, before noticing the fact that their skin has been retouched. Retain a bit of your skin’s natural texture. Don’t correct all the minor, harmless imperfections. Use before/after comparisons to judge your cleanup as you work. When your retouch looks natural, not erased, you have done an amazing job.