I have been studying the art of improvisation in it's many forms for over 35 years.
From a musical perspective all my bands are improvisation based, many performances are totally improvised
'The Iota Group' and 'The Jammers' where the Buckingham/Donald Quartet uses themes as vehicles for improv.
Within the art domain the same principles of creation apply.
Most paintings are expressive improvised statements of my current state of being!
An attempt to take the intellect out of the creative process and let the emotions, expressions, the human creative being come to the foreground to produce a statement of the 'now' that hopefully has appeal to onlookers.