Discreet Logic produces the Lightscape visualization system, a high-end 3-D rendering package that simulates lighting in specific settings and applications (architecture, interior design, lighting design, etc.).

Lightscape calculates and visually renders indoor lighting applications based on proprietary full-color, radiative-transfer algorithms. The program also incorporates a ray-tracing engine that adds specular highlights and reflections. Lightscape's progressive refinement algorithms produce a useful image quickly. The quality of the image improves as calculations continue.

Registered Lightscape users can download upgrades, utilities, tools, and product information from this Web site.

E SOURCE is an independent, membership-based energy information services company that offers publications on energy efficient technologies and other energy issues. One of these is the Commercial Space Cooling and Air Handling Technology Atlas – a comprehensive and definitive reference that combines up-to-date technical information with practical case studies and application guidelines.

E SOURCE member organizations can access a special password-protected section of the site containing the full text of E SOURCE reports and other materials.

This company produces Lumen Micro, a software package that performs lighting and daylighting analysis. It utilizes complex renderings that incorporate interreflections and obstructions. Its daylighting analyses are based on latitude, longitude, time of day, and date. Users may adjust the transmittance and reflectance of windows and skylights. A demo CD can be ordered online.