I'm looking for a free or inexpensive program, online or not, that allows me to draw a benzine curve on a grid. The reason is the noble purpose of creating a more organic looking spaceship in Space Engineers (http://http://www.spaceengineersgame.com), a voxel based program. I have discovered http://http://oranj.io/blog/VoxelSphereGenerator which is great for scribing ovals and circular objects, but not so good for bezier curves. Any help would be appreciated. Many moons ago I had Illustrator, but don't see the expense for an upgrade for this purpose. Suggestions appreciated!