1. A content editing device comprising: memory storing image data descriptive of an image; at least one processor coupled to the memory; and a pattern stamp component executable by the at least one processor and configured to: generate an illumination map descriptive of a texture within an area of the image at least in part by being configured to: compute derivatives of the area; classify each derivative as either a shading derivative or a reflectance derivative; integrate derivatives classified as shading derivatives into a shading image; integrate derivatives classified as reflectance derivatives into a reflectance image; and multiply at least one value of each pixel of the shading image by at least one value of each pixel of the reflectance image to generate at least one value of each pixel of the illumination map; fill the area with a pattern; and apply the illumination map to the area to generate a textured pattern within the area.