This is a simple 3dface only dxf file format which will always work. It has no blocks or inserts but can become very large. This is a simple ascii RAW file format, it can become very large. One triangle per line. The base element is a cylinder, but a cone is used when combined with the -i option.
Leaves are still triangles.
This is a the ascii format which can be loaded in the Blob Sculptor PD editor for further editing and preview. This is a the ascii VRML v1.0 format which can be loaded into a VRML viewer for further preview. The -s option allows you to set the maximum size of the production string in Kbytes. This string has to be stored twice and is the main data structure. This is to allow much larger strings to be processed on larger memory systems.