Why does ContrastMaster not effectively work on silhouette photos?
ContrastMaster is not meant to be used with photos with extreme contrasts that have one area totally black and the rest of the photo extremely bright. If you want to remove the shadows from such photos, you better use a shadow/highlight tool like our LightMachine plugin. After your brightened up the photo you can use ContrastMaster with more success. If the contrasts are not that extreme in the photo, the Brighten slider in ContrastMaster may already produce the desired result. If you do not want to lift the shadows in the photo, you can also switch to Global Contrast mode in ContrastMaster for applying some tonal tweaks.