The Z Stack

As well as the vesicles, a major glass element of the sculpture was the Z Stack, as I like to call it. This is a form made from ‘slices’ of glass, each with a different colour or texture, that when mounted together suggest a three-dimensional form.

The Z Stack was an element that came to mind very early in the process during my visit to the labs, when Arindam explained to me how the images of the ‘spheroids’ of cells were constructed. The confocal microscope could be instructed to scan multiple layers of a three dimensional object, and would then build an apparently three dimensional image from the slices it had scanned. The number of scans that go into constructing the image would then affect the resolution of the object and also the time to create as well as the ultimate file size.

A non-glass mockup of a Z Stack – my first experiment with the idea

There are two main textural types of slice in the Z Stack – those with ‘miniature vesicles’ on the surface, and those which have a honeycomb structure. The honeycomb is the one reference in the piece to the original source of the peptide, the Amazonian wasp.

I wanted to create an analogue analogy for the Z stack, to create a 3D form from slices, and from that my Z Stack was born. Initially I thought it might be interesting to make the slices ‘floppy’ to accentuate the departure of the analogue from the digital counterpart, but aesthetically I found it confusing and cumbersome. I also wondered about offsetting some of the slices from the horizontal, but again this appeared to confuse the communication of the idea.

In the later stages of construction, I continued to experiment, but this time with the number of slices to see what worked best in creating an outline form. Below is the version with 9 slices.

I ultimately settled on 11 slices as giving the most pleasing form.

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