Is spherical mirror projection supported?

Spherical mirror projection is a low cost dome projection method where a data projector is aimed at a quarter-sphere mirror (ideally a first-surface mirror) to reflect over most of a dome. Quality does not match fisheye lens projection, and it can be difficult to set up, but it is certainly very affordable.

Nightshade supports spherical mirror projection. This can be enabled using the configuration GUI (hit '1' key) on the Video tab. Note that the config.ini file where you will need to edit your configuration for your particular mirror/dome geometry is displayed at the bottom of this window. Select "spheric_mirror" as the projection type to begin using this mode.