got it! :D I've checked and it's an interesting effect! It's actually created because the texture of the sphere is set to world space, which leaves the volume texture at about ground level. The curved edge is at the edge of the sphere but it's curve is on a horizontal level. The visual effect gives the illusion of a HUGE spherical shape while actually it's more like a disc with a high density around the edges, or so it seems so far. I've tried setting the texture to object space, but failed to get any visuals. So I tweaked around with the filter of the 2nd component in the DTE a bit and got a really interesting effect! I'm rendering an 8 second animation of the camera turning around it for you, it's pretty awesome!

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