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- "Segment" determines in which segment of the spline you want to place this control circle (only use for spline with more than one segment).
- "Offset" in which position the control circle is located (0 means the begin of the spline and 1 end of the spline).
- "Radius" determines the fluid stream's thickness when Emission > Creation is set to "Tube" or "Edge". You can use the viewport gizmo as well.
- "Speed" is the particles' emission speed at creation time. This value is combined with the global "Speed" parameter.
- "Rotation" makes it possible to change emission direction. Direction is indicated by an arrow in the viewport gizmo.
- "Thickness" It is possible to control the thickness of the emission per control point.
Animated Splines
Very nice simulations can be achieved with animated splines: many of Cinema 4D's built-in spline have animatable parameters, e.g. radius or angle. The "Spline" emitter recognizes these changes over time and uses the animation to control particle emission.
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