A film remake is one that is based on a previous film. It is popular with studios and production companies because it reduces the financial risks, as fans of the original work are likely to feel more comfortable going to see something that is already somewhat familiar to them. Also, the original producer may still retain (and thus not have to pay again for) the film rights. Technological advances are also a factor. A silent film can be redone as a "talkie", a black-and-white movie can be remade in color, or both. A regular 2D motion picture can be redone in 3D.