Joshua Light Show is a collaborative group of artists who create abstract visuals live during music concerts. Alyson Denny has been a member of the group since 2008. Below is a selection of performance documentation.
NYU Skirball Center, NYC, 2014

The Bad Plus playing Ornette Coleman's Science Fiction
©Michelle V. Agins/New York Times

Television
©Stan Schnier
River to River Festival, NYC, 2013

So Percussion
©Mark Hallett
NYU Skirball Center, NYC, 2012

Terry Riley and Gyan Riley
©Greg Kessler

Evelyn Glennie and Zeena Parkins
©Greg Kessler

Denny spinning some oil
©Greg Kessler

Bill Laswell, Milford Graves, John Zorn, Lou Reed
©Greg Kessler

MGMT's Andrew VanWyngarden & Ben Goldwasser
©andrewvanwyngardenarms tumblr
MGMT's Andrew VanWyngarden & Ben Goldwasser. This is a long clip. There's a particularly nice section starting about 20 minutes in.
©Donald Higgins
Transmediale, Berlin, 2012
Die Zeit video backstage during the opening night performance. (You can click this link if the video does not appear above.)
©Die Zeit

Oneohtrix Point Never (Dan Lopatin)
©Ania Domanska/transmediale

Supersilent with Stian Westerhus
©Lindner Genz/transmediale

Post-performance audience inspection of the Joshua Light Show
©transmediale
Fulldome, Hayden Planetarium, NYC, 2011

Performance at the Hayden Planetarium
©Stan Schnier
Behind the scenes of Joshua Light Show performing Fulldome
©Bec Stupak