Curvemeister Forum

So, a way to make a point in the middle of the curve behave like an end point, in the sense that it has a sharp bend, rather than a curve that blends in with adjacent points.  This is essentially what the lizard tail is trying to do by adding multiple points, and I often use the corner fill feature to do a lizard tail for the shadow and highlight.

BTW, the hue curve has the opposite problem.  It would be nice to get rid of the break that happens between 0 and 360, so that there is no abrupt break in hue at that point.

Photoshop can do this, by the way, by clicking on the curve's pencil icon and then shift-clicking on the curve to define straight lines. 

I forgot about that.