Modeled in 3dsmax. Rendered in LuxRender (v1.0RC4).
A sphere, consisting of just 16 segments, converted to editable poly object, and the edges outlined, with a shell modifier applied. Then the sphere was sliced symmetrically, in a radius, along the X axis, for a count of 3, and the result mirrored, to give you the shape you see here. Hope you like.