HDRI Panorama. HDRI / 360° Fürstenfeld, Austria HDRI shootetd near Mittersil in Salzburg Austria 78th HDRI Panorama release.
Archviz background images. Paguthrie's Portfolio. CGSkies - 350+ Panoramic HDR Skies. Light Probe Image Gallery. Updated 10/9/04 SIGGRAPH Course Paul Debevec, Dan Lemmon, and colleagues taught a half-day course on Image-Based Lighting at SIGGRAPH 2001 and 2003.
The web page (with the final notes) for the course is here. Download Free HDRI maps (Free High Dynamic Range Image or HDR maps)