env_blood
env_blood is a point entity available in all 
GoldSrc games. It is used to spawn blood effects.
Key Values
Targetname:
- Name
(targetname)<string> - The targetname that other entities refer to this entity by.
- Pitch Yaw Roll (Y Z X)
(angles)<angle> - This entity's orientation in the world. Pitch is rotation around the Y axis, yaw is the rotation around the Z axis, roll is the rotation around the X axis.
- Blood Color
(color)<choices> - Color of the spraying blood.
- 0: Red (Human)
- 1: Yellow (Alien)
- Amount of blood (damage to simulate)
(amount)<string> - Intensity of the blood spray.
Flags
[1]:Random Direction[2]:Blood Stream[4]:On Player[8]:Spray decals
