So, what you get with stroke stabilization enabled in Procreate is a simpler shape than your actual movement or original stroke you made. In simpler terms, instead of following your natural pencil movements, it makes your shape a lot straighter and smoother automatically. Stabilization, technically, takes an average of the movements you make with a stroke and only draws that predictive average of what you were trying to make. This feature can be seen as a more aggressive version of StreamLine.

But if you increase the pressure using the slider, the smoothening effect will only kick in when you apply some pressure while drawing a stroke.

Pressure: If the pressure in StreamLine is turned off, the stroke smoothening is going to start as soon as you make a stroke.

However, turning it off will get you back to your natural strokes.

You can use the slider to turn up the StreamLine value for smoother strokes. Amount: It defines the stickiness and evenness of your stroke.You can use this feature for calligraphy, creating shapes, and even for outlining. It’s even close to an actual shape of a circle with the same minimal effort. As you can notice, the circle drawn with 100% StreamLine is smoother and less wobbly than a regular circle.

Procreate line art