There's an fx_settings.h file in the skyrim root folder, this has the setting for the shaders Inside, de-comment tone mapping, then scroll down to the tone mapping section, there are controlls for contrast, gamma and saturation, as well as bleach bypass and colour push These should have all the settings you need. Don't expect the results to look like photoshop though, since they are realtime, sometimes the quality of the output can be a bit off