Modeled in 3dsmax. Rendered in LuxRender (v1.0RC3).
A combination of renderable splines and some Maxscript to create complex curvs on the surface of several interlinked geospheres. The geospheres are not rendered here, only the splines. Amazing what Maxscript can do. I can't wait until Autodesk fully implements Python scripting as part of the Max architecture. Blur Studios have released Py3dsMax, which allows you to execute Python inside the 3dsmax framework, so this really opens a lot of powerful scripting possibilities.