Lighting for architectural design in 3D virtual worlds

Here is the completed summary with the missing terms highlighted in bold:
3D immersive virtual worlds are environments where designers can experiment with lighting design in an interactive, collaborative manner, which typical 3D modelling systems cannot support. Virtual worlds are internet-based; thus, the objects to be rendered reside on a remote server.
Features that allow one to dynamically alter lighting parameters can also limit rendering options and complexity. A computer with fairly good graphics rendering capabilities is required to support advanced lighting options. It's a good idea to check the software's website to find the required computer specifications. For better performance, one can set a large number of options that adjust graphics parameters.
The differences between basic and advanced lighting affect the types of lights used and the rendering of a scene. Thus, the lighting designer as well as the users within the virtual environment need to take into account their computer's graphics capabilities for lighting.

 The light coming from a source within a prim can only be seen when the light strikes another object.
We see this when an object is lit by a Second Life light source.
 A beam of light cast from a light source can be accurately modelled.
A light beam (representing the light striking particles in the air) has to be modelled separately from the light itself. A cone or cylinder emanating from the light source can serve as a rough approximation.
 The glow from a light bulb has to be roughly simulated.
This can be simulated by setting surface texture features on the light source prim, such as glow and transparency.
 The modelling of sunlight is a crude simulation of the real phenonmena.
An increase in level of sunlight is indicated by a brightening of the ambient light of a scene (and possibly the colour). However, this brightening is uniforn; thus, an interior will receive the same amount of increased ambient light as an exterior scene.
 The position of the sun can be set to accurately represent a location and time/date.
It is possible to set a sun position and have shadows cast, but in a virtual world a position representing a place on earth and a specific time of year is not possible. One can represent the movement of the sun with a daily solar cycle, but the movement of the sun in the sky will not vary from one day to the next.

Here is some of the useful terminology you may have noted from listening to the second part of the presentation. Use a specialist dictionary in English or in your own language if you are still unsure of the meanings of any of the terms after reading the transcript below:
lighting parameters
prim (geometric object in Second Life)
dynamic shadows
directonal lights
omnidirectional light
falloff
glow
transparency
3D modelling systems

1. An omni-directional light casts light in all directions (spherical).
2. A projector is a type of light in Second Life that casts light in a single direction, i.e. cone-shaped.
3. Light intensity refers to the level of light or its brightness.
4. Falloff refers to the amount light intensity decreases as the distance from the light source increases.
5. A virtual, immersive lighting chamber is the virtual world equivalent of a physical light box.