Partial invisibility



A blur artifact (also known as a partial invisibility sphere) is a powerup that appears as a floating red orb with a blue eye-like pattern. Picking one up will grant the player temporary partial invisibility. The player's sprite (as seen by other players in multiplayer mode) will be given a filter similar to that of the spectre, while the affected player will see their own weapon as partially invisible. When 5 seconds remain, the weapon will begin blinking, signaling the end of the artifact's effects. The player's sprite, however, will remain affected until all 60 seconds have expired.

Monsters firing upon an affected player will have their accuracy reduced, in that their attacks will be offset by a random amount, causing them to miss more often. This, however, may cause more experienced players to inadvertently dodge into hostile fire rather than away from it. Nevertheless, a blur sphere bestows an advantage against a hitscan (bullet) shooting monster. On the other hand blur effects are unable to disrupt monster melee or Arch-Vile attacks (even though the monsters do seem to turn around confused.)

Appearance statistics
The IWADs contain the following numbers of blur artifacts: