here's lightvector v93.jpg:

here's lightvector v96.jpg:

here's lightvector v97.jpg:

Using C.E.M.E.N.T., the following image is obtained:

Dusting the AGO steps, here's Michele Ernsting, from Radio Netherlands, who came to interview us:

Another of Michele dusting the steps:

Here's an image pair, with dust, and no-dust, which we could make into animated gif, or other format, that shows the dust when the mouse moves over the lighted area:

Here another image pair that shows dust and nodust: