Realsoft 3D is a modeling and raytracing application created by Realsoft Graphics Oy. Originally called Real 3D, it was developed for the Amiga computer and later also for Linux, Irix, Mac OS X and Microsoft Windows. It was initially written in 1983 on Commodore 64 by two Finnish brothers Juha and Vesa Meskanen. The development of Real 3D was really started in 1985, as Juha Meskanen started his studies at the Lahti University of Applied Sciences, Finland. Juha's brother Vesa joined the development and jumped out from his university career to start the Realsoft company in 1989.