Sculpting the Forest Spirit - ZBrush Creature Design: Creating Dynamic Concept Imagery for Film and Games - page 450

Spotlights are loaded under the File ⇒ Spotlight menu. Spotlights cannot be saved with Project
files and must be saved and loaded separately. While a Spotlight is loaded, you can enable and
disable it with the Shift Z hot key.
6. You can save the Spotlight file for future use by clicking the File ⇒ Spotlight ⇒ Save Spotlight button
( Figure 8-11 ) . This will store a file that contains all your reference images at full resolution. This can be
loaded back into any scene at a later date. Spotlights must be saved on their own as they will not be stored
within a project file.