Imagine, from Impulse Inc, was a cutting-edge 3D modeling and ray tracing program, originally for the Amiga computer and later also for MS-DOS and Microsoft Windows. Imagine was a derivative of the software TurboSilver, which was also for the Amiga and written by Impulse. The Windows version of the program was abandoned when Impulse dropped out of the 3D software market; but the Amiga version is still maintained and sold by CAD Technologies. The Windows and DOS versions have been made available in full along with other freely distributed products such as Organica.