Displaying molecules with a 3d shape

[sgitkene]

Hi it's me again, with some strange molecules. https://en.wikipedia.org/wiki/Octanitrocubane I would imagine it being rendered a bit more like in the image on wikipedia. https://en.wikipedia.org/wiki/Twistane also a large dissimilarity https://en.wikipedia.org/wiki/2.2.2-Propellane https://en.wikipedia.org/wiki/1.1.1-Propellane https://en.wikipedia.org/wiki/Bicyclo(1.1.1)pentane https://en.wikipedia.org/wiki/Adamantane displays some CH_2 https://en.wikipedia.org/wiki/Iceane I don't know how you'd render that https://en.wikipedia.org/wiki/Cubane

[sgitkene]

they are however the same as on http://opsin.ch.cam.ac.uk/ so I guess you can't fix it.