Calypso Raytracer

Calypso is an attempt to produce a photorealistic raytracer with the C++ programming language using the Qt toolkit and the KDE libraries for a modern user interface.

Calypso is written by Sami Kyöstilä and Joonas Kerttula. It is a C++/Qt/KDE-based photorealistic raytracer. Note that Calypso is no longer actively maintained. The software is licensed under the GNU GPL.


Here’s an incomplete list of features that are already implemented.

Task list



You can find some sample renderings from the gallery.


You can download the Calypso source code from the right hand sidebar.

In order to compile the raytracer, you should have a working Qt/KDE build environment. If you want to have support for loading 3DS-meshes, you also need lib3ds version 1.1.0 or newer.

Please note that these packages are all development versions. The packages include project files for the KDevelop IDE.

Here are some links related to raytracing and computer generated images.