This is a playable tech demo. All painting software (Photoshop, Krita, etc.) rasterize your strokes as you work. This means the stroke is frozen forever. You may use some tools like perspective warp or liquefy but they are quite limited. The Soft Edge engine instead keeps a record of your strokes as data and rasterization happens on the fly, on each frame, like in a game engine. This lets you sculpt any property of your stroke.Right now you can paint the following targets: pressure (which makes the stroke thicker or thinner), colour, and its position (you can grab the stroke after it was drawn).