Google O3D API: How To Change The Polygon Rendering Mode
Wireframe rendering
In my first test of Google O3D, I had a problem: how to display a wireframe object or better said how to change the polygon rendering mode: POINT, WIREFRAME or SOLID. The answer is rather simple: just play with the FillMode attribute of the material’s state. But before playing with the material’s state, you have to create a state and attach it to the material:
var state = g_pack.createObject('State');
g_Material.state = state;
Once done, you’re ready to tweak the FillMode attribute:
state.getStateParam('FillMode').value = g_o3d.State.WIREFRAME;
or
state.getStateParam('FillMode').value = g_o3d.State.POINT;
Point rendering
or
state.getStateParam('FillMode').value = g_o3d.State.SOLID;
Solid rendering
You can play with the demo HERE.
Thanks to gman for the tip 
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Hi!
I saw your posts about o3d and they are very helpful.
I have a question that you might be able to answer. I am trying to plot a 3d surface (a mesh). I would like to have a mixture of fill and wireframe rendering, by showing a thin black line along the mesh edges.
Do you have any idea how to approach this?
Thanks!