As so often happens someone mentions something in passing and I must then try it out. I was interested to have a picture in which the focus was nothing – a black hole.
The crucial image is an X-ray of a man with pulmonary haemorrhage it appears right in the centre of the picture. The teaching file did not mention a cause, and there’s nothing specific on the image to suggest that it may be due to a bleeding disorder, blood-vessel abnormality, infection, or cancer.
A perfect sphere was cut to include most of the chest and then reduced twelve times concentrically to obtain a stepped sphere-like effect which wasn’t particularly attractive. Once the lower eleven layers had been fused together and treated to produce the blue-green colour, the more-or-less unchanged chest on the top looked more acceptable. A close-up photo of the inside of a blood-red Dale Chihuli glasswork was layered both over and under the sphere, though the colour was greatly modified in the process. The colour and a network of tree branches then overlaid linked nicely with both pulmonary tree and haemorrhage.
The focal point of the picture is a relatively empty space behind the branches on the right of the image towards which the eye is directed. There was no need to introduce artificial perspective because the focus came from the structure of the glass. This reminds me of science fiction representations of objects inexorably moving through space.