Hi Phil, XenoDream lets you interactively create a huge variety of 3D shapes, that may include fractal structures. You can export them as meshes in OBJ format. At present the coloring and material effects are not able to be exported with the mesh. XD can do flames, with more variety of shapes than other programs, but it's a different rendering method and sometimes the coloring and pseudo-texture doesn't look as good as the others. Regards, Garth