We tried crossing two beams of light inside a block of aerogel, thinking it might somehow produce a brighter point in 3D space. It doesn't. However, some beguiling effects can be obtained, in 2D and in 3D, using two projections onto a block of aerogel.

Perhaps reminiscent of dappled sunlight and silhouettes of passing strangers, this is actually two projections of Outtake (a version of Ghosts from 2003 - see squidsoup.org/outtakeholder.html ) from different angles onto a small block of aerogel.

Aerogel provided courtesy of Airglass AB (airglass.eu)

squidsoup.org