Spritenoshade
spritenoshade <tilenum>
Causes sprite <tilenum> to be unaffected by the shade of the sector it is in. This command should be used outside of actors, states or events (like a definition).
If you want an actor to glow like some projectiles in the game, use this together with setactor[THISACTOR].shade -127 and/or the flash parameter.
See htflags.