Since Filled Stroke takes into account the start and end points of your line, make sure Line Smoothing is set below 100%.Otherwise your shape will disappear into a line or a point as though the rest of the stroke never happened. Excellent for shadows, light, and complex figures, we think you’ll appreciate the possibilities this brush offers your design + art toolkit. Your resulting fill is a clean finish, customizable with opacity and line smoothing. Of course, if you draw over the area a third time within the same stroke, it becomes positive again and is filled.
This crossing over of a filled area causes it to become “negative space” and remain empty. “Positive space” refers to any area inside your drawn line between start and end point that is original to the stroke - as in, the area hasn’t been drawn over a second time during the same stroke. It allows you to draw any type of shape - simple, wriggly, complex - with a stylus or finger, and fill the positive space inside.
Not to be confused with Bucket Fill (which we’re currently working on - lots of definitional bits to think about with the interactive parameters of vector strokes), the Filled Stroke tool is a brush unique to Concepts.