Thank you Michael for explaining about the squashed curve. I imagine the squashed curve would not be well behaved with other commands...

The Perspective Projection reminds me of stereoscopic projection with a sphere, and also the "beachline" with voronoi.

In my two brief attempts, the Moi Silhouette command attempt in the plane of the curve, did not work. I wondered if it uses some different algorithm than the Moi Project command. Would a more conventional use of the Moi Silhouette command ever produce squashed curves?

The Moi Silhouette command seems to be an orthographic projection ?
Same for Moi Project command?

- Brian