Texture
Appearance, feel or consistency of a certain surface or substance. It is the distinct physical composition or structure of something, especially the size, shape and arrangement. For example, something could have a rough and grainy texture however something else could have a smooth texture. In a photograph, texture helps emphasise the features and helps to create some sort of form. Texture can be used to give realism and character to a picture and may in itself be the subject of a photograph.