Bitmap textures are digital images representing a surface, a material, a pattern or even a picture, generated by an artist or designer using a bitmap editor software such as Adobe Photoshop or Gimp or simply by scanning an image and, if necessary, retouching it on a personal computer. When designed for print, textures should be created in high-resolution in order to achieve good results in the final print. If creating a texture with a computer is not an option, then textures can be obtained by purchasing stock images collections, which are expensive but often of a professional quality.