David, I gave your cone a spin in Poser Pro 2010 this evening, using the default OBJ import options.

It's a big improvement over the Poser cone, but I'm still getting some problems - see screenshot. There is some barely discernible ballooning - I had to put a straight edge up against the cone edge on my screen to be sure of this. Also, the surface gradient is nowhere near smooth near the top end. The Poser hi-res ball, on the other hand, is showing nice smooth shading all over.

Perhaps Poser doesn't like the long thin polygons? Not sure...

Anyway, I don't want you to spend any more time on it, just thought you might be interested.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)