a serious panel

I have an idea for a panel discussion on digital painting. It will not be held in a sleek museum but in an abandoned garage or squat somewhere. (Obviously somewhere outside of Greater New York.) Solar panels and batteries will be used to power the PCs and laptops of the panelists, as well as a projector. Use of phones or pads will be discouraged without a bluetooth drawing tablet for serious work. The event will not be "streamed."
The topic will be digital presets of paint programs, the philosophical baggage of "brushes" and the idea of the "canvas" or "neutral surface." Examples will be projected, and the panelists will demonstrate the relative merits of particular techniques. Not for technique's sake, but as a catalog of signifiers and the creation of chains of meaning out of same. Is this "brush stroke" skeumorphic? Does that matter? Is this one a gimmick? Does it matter if the software is "proprietary"? How does printing the image change it?
One ironclad rule: if any panelist uses the word "market" he or she will be excused and sent home.

sketch_l3

sketch_l3

Drawn with Linux MyPaint.

Brushes are bit like softsynths in music -- they are presets that someone worked out with an idea in mind but they can be tweaked for a different idea.
Am not sure what the "alien egg" texture was intended for originally but I doubt it was an alien egg. That required using several other brushes in combination.