VCG ShadeVis computes a simple, static (but much more correct) per-vertex ambient term. This effect, commonly known as ambient occlusion, is aimed at providing more faithful shading for realtime rendering. In practice, rather than considering the ambient lighting to exist uniformly throughout a scene, this approach determines the ambient brightness of each part of a surface to be proportional to the extent to which the surface has "its outward view of its environment" free (i.e., "occluded") by other surfaces of the object. The most common technique to compute ambient occlusion is based on shooting rays from each surface element to evaluate the quantity of light that reaches it. VCG Shadevis uses OpenGL to accelerate this process by simply rendering the scene orthographically from a set of uniformly-distributed directions and checking against the zbuffer whether each vertex is occluded.
PCity is a procedural city generator. It uses a configuration file and few maps (e.g. population density or a height map) and can be tuned via various parameters. Its features include street network generation, building generation, texture generation from a texture library, and a visualization engine.
The Pure Perl RayCaster is a small simple ray-casting application written completely in Perl without using OpenGL or any other 3D API library. For the GUI, it uses wxPerl. It can load a 3D object from a file (in RAW format), display the object in wireframe perspective view, allow you to orbit and zoom your camera, and produce a user defined size ray casting image of the current view in a predefined color theme, with or without smooth shading. It is well suited for educational purposes, in order to study, understand, tweak, and try well known fundamental 3D computer graphics techniques.
Radzilla is an advanced lighting simulation system. It is based on Radiance, but features additional extensions and a GUI. It is targeted mainly to Radiance users who are a bit more courageous about new features and optimizations and to those who would like to enjoy the power of Radiance but have been afraid of its pure command-line interface so far. Radzilla tries to stay as compatible as possible with "classic" Radiance. Even many tools and files from the classic distribution are used.
TerraJ is a Java port of fractal terrain and simulated solar system generation programs. The porting has included extensive refactoring, the creation of a documented API to enable reuse of parts in other programs, and extensions such as new Swing user interfaces. Full javadoc for the classes in the project is available.
myOS is a minimalistic, OpenGL capable, GNU/Linux-based system without X. It is a bare bones Linux system, stripped of everything but the files necessary to compile and run OpenGL/C code. It has a simplified directory structure and a cleaned-up internal cross referencing. It has two available variants. myOSx-less fits within a 64 MB RAM disk and features a WebKit based on Trolltech's Qtopia demo Web browser. myOSx is oriented for X11, and its development tools are built around Trolltech Qtopia to produce applications based on the WebKit and for the framebuffer of the original myOS system.