Here you can define the conditions for the creation of waterline foam particles based on various threshold parameters.
Objects
Click on the hyphen (“-”) and choose which objects will be creating a foam ring. If you want to create waterline rings with different properties you have to use one “Waterline” emitter per object.
Emission rate
This is the number of particles which are created per second per cubic metre. The final number of particles also depends on the various threshold values and the used particle type. In some cases it can be necessary to use very high settings of 1,000,000 and more.
Width
This parameter controls the width of the waterline ring around the object. This value is measured in metres.
Position variation
New waterline particles are created within the given value around a grid fluid particle. Higher settings add more particles. If you can see cloudy or spherical structures you should choose a smaller value. The parameter's unit is metres.