Arcor seems dead. Probably suicide... Not a nice thing to discover after you spent an hour to write a friendly reply with some pictures.

And now, in the middle of the night, the magic is complete. I got it !

Many thanks for all the great help Ulrich, Robert. Especially the wonderful images make understanding easier. But I still need a little time because all this is`cryptic and magic`indeed.

hallo ulrich,

many thanks for your second message with magnificent images. I had understood your acute/shallow (obtuse is another word for this)explanations right from the beginning it seems (although in a strict geometrical sense the 2 acute edges AND the 2 obtuse edges are parallel to all 4 ...

slot 1 should be slot 9. sorry ulrich !

Not that easy. Even after two hours I could nor get the result, I suppose through lack of real understanding on my part. Please see my remarks in your text.

it can be constructed quickly in the following way:

You choose the triangular prism (hit 3,4,4 and ok in the search field). You put this ...

Robert Austin excited me with his model of a compound of 3 Rhombic Prisms made with Stella. I asked him how he made it but he answered that he had no idea.... intuitive action so to say.
That excited me even more and after a lot of work I found out by plane geometry (quite interesting geometry) all ...

Not so long working with Great Stella but.. I want to let the world know that you can make wonderful tours (slideshows with very impressive 3d-looking transitions) with a few clicks.
You can export this as an avi (best settings for me:Cinepak codec, oversampling 3),open the avi in f.e. Windows ...

Not so long working with Great Stella but.. I want to let the world know that you can make wonderfull tours (slideshows with very impressive 3d-looking transitions) with a few clicks.
You can export this as an avi (best settings for me:Cinepak codec, oversampling 3), open the avi in for example ...

Many thanks once again Robert. This way it is working.

Hallo Robert !

Many thanks for your very precise description. Within 10 minutes I had the models rolling over the screen, giving me a thrill as never allover because it was the first time I 'created' something in Stella. Now there is a lot of learning to do but with f.e. your fantastic models of ...

Hallo Marcel ! Many thanks for all the wonderful compounds you made. I wonder how you did it.... I opened them simply the way Robert suggested and had a hell of a good time after. Why not try a few a few more. Dodecah. Icosah...... Dankjewel. Jos.

Just bought Great Stella4D. Happy to join the club of symmetrists. Having built quite a few models over the past years I am ready to tackle the compounds of 2 icosahedra as shown here:

http://mathworld.wolfram.com/Icosahedron2-Compound.html

With only trigonometry I find it rather difficult and ...

Just bought Great Stella4D. Happy to join the club of symmetrists. Having built quite a few models over the past years I am ready to tackle the compounds of 2 icosahedra as shown here:

http://mathworld.wolfram.com/Icosahedron2-Compound.html

With only trigonometry I find it rather difficult and ...