Classes:BlurSphere

From ZDoom Wiki

Blur sphere
Actor type	Powerup	Game
DoomEd Number	2024	Class Name	BlurSphere
Spawn ID	135	Identifier	T_INVISIBILITY

Classes: Inventory→PowerupGiver→BlurSphere

This is the invisibility sphere powerup from Doom and Doom 2. When picked up, it causes the player to appear translucent (or fuzzy, depending on the user's settings) to other players, making him difficult to see. Enemies which have not yet woken may fail to see a player with this powerup active, and enemies that are firing on the player will miss by a random amount. While this powerup is in effect, the player's weapons will appear translucent/fuzzy on the HUD.

DECORATE definition

ACTOR BlurSphere : PowerupGiver 2024
{
  Game Doom
  SpawnID 135
  +COUNTITEM
  +VISIBILITYPULSE
  +INVENTORY.AUTOACTIVATE
  +INVENTORY.ALWAYSPICKUP
  +INVENTORY.BIGPOWERUP
  Inventory.MaxAmount 0
  Powerup.Type "Invisibility"
  RenderStyle Translucent
  Inventory.PickupMessage "$GOTINVIS" // "Partial Invisibility"
  States
  {
  Spawn:
     PINS ABCD 6 Bright
     Loop
  }
}

note: Blur sphere respawns only if sv_respawnsuper is set.