Would it be a big problem to enhance the Virtual visit the followning way ?
- alowing to change (mainly widen) the focal distance of the camera - sometimes it is difficult to get far enough from an object to see enough part of the scene, specifically if you are an a narrow space
- keep the stored points of view between sessions - in other words store them in the sh3d file
- on a virtual visitor - better graphically diferentiate azimut / slant icons - instead of use circle with an arrow for the both
- support a mouse wheel when the virtual visitor get focus - e.g. wheel=azimut change, wheel + right button = elevation
- Display the true elevation of the virtual visitor above the floor of the virtual visitor
- Allow to automatically change the virtual visitor elevation acording to the selected level (follow the level displayed)