Check out this example of how photogrammetry is being used to render 3D models that can be later be used to expose ancient polychromy. This is a project by Rigsters 3D at @glyptoteket, in which a Greek terracotta figurine (about 2400 years old) was 3D scanned through photogrammetry and then Visible-induced Luminescence (VIL) to locate and document traces of Egyptian blue, a synthetic pigment commonly used in antiquity.