How can I get more specific Vector Field creation?

Neither. It generates a vector field directly in the Unreal Engine Format. It runs in python.

In the main in the bottom of the file, the following FGA-files are created:

if __name__ == "__main__":

    print("Create VectorField_Source16.fga")
    # self, Resolution, Minimum, Maximum):
    Source16 = FGA([16, 16, 16], [-100, -100, -100], [100, 100, 100])
    Source16.saveToFile("VectorField_Source16.fga")
    
    print("Create VectorField_Cone16Normal.fga")
    # self, Resolution, Minimum, Maximum):
    Cone16 = FGA([16, 8, 8], [40, -35, -35], [190, 35, 35])
    Cone16.Normalize()
    Cone16.saveToFile("VectorField_Cone16Normal.fga")

    print("Create VectorField_Vortex8.fga")
    # self, Resolution, Minimum, Maximum):
    Vortex8 = FGA([8, 8, 8], [-100, -100, -100], [100, 100, 100])
    Vortex8.Cross([0,0,1])
    Vortex8.saveToFile("VectorField_Vortex8.fga")