Velocity

    • Normal
    • The emitter's surface normals (i.e. let the surface normal give the particle a starting speed).
    • Let the tangent speed give the particle a starting speed.
    • Rotation
    • Rotates the surface tangent.

    Emitter Object

    • Align
    • Object
    • The emitter objects movement (i.e. let the object give the particle a starting speed).
    • Random
    • Gives the starting speed a random variation.You can use a texture to only change the value, see Controlling Emission, Interaction and Time.