From the Beyond Force homepage; "The third and last part of the not-so-famous series of Attack of Stubidos was released at Assembly held in Helsinki in august 1994. All demo coding in this demo was done by Gremlin. The demo won the Assembly 1994 demo competition.
The introduction starts as some text declares the producers and the demo name. Then there is a routine that is a bit like the part in poor including electrical potential fields except that this version is much more real time and is only ment to be a design effect with text changing on the field. After a while when all the text is shown the demo continues by loading the next part.
In the next part there is a big text naming the effect that is about to be shown. Then the effect starts. Background changes into blue and a filled vectorcity zooms in and rotates around y-axis. After a while of rotating still it starts to zoom and move around the screen. The city itself is really like a shadow of a city and is updated every second frame. On the background there is a picture of a planet or something like that giving some design touch (hopefully it worked). After a while of showing the routine (a while which turned out to be a far to long while) the demo goes on and starts loading the next part.
The third part features sierpinski triangles. Sierpinski triangles are ofcourse like pascal triangles turned into graphics so that when in a pascal triangle there is an odd number a dot is drawn and otherwise it isn't. Triangles are rotated around all three axises and zoomed in and out. First there is a normal single triangle and the an object with two triangles. Then a tetrahedron shows up with hidden lines removal included. The last thing in the effect is a more complicated object including an object with four triangles. The music in the part was composed by Skyline Technics of Horizon. After all the objects are shown the demo continues by loading the fourth part.
The following part introduces itself with some text telling what the next effect will be and then it moves on to the effect which is a mandelbrot zoomer that zooms mandelbrot fractals very deep. The routine itself obviously cannot calculate all the frames on C-64 real time so every 32th frame is precalculated and packed with a packerroutine made especially for this demo part. Rest of the frames are made with a normal zoomer that zooms until the precalculated frame is double the size of the original and the the precalculated frame switches to next precalculated frame and start zooming. There are two different fractals in the zoom. After zooming both the fractals the demo continues by loading the last part. The music in the part was composed by someone in Camelot.
The last part is a pure real time filled vector routine on C-64. The line routines, filler and 3d-calculator are pushed to the limit. Some of the routines use some undocumented commands too so the part doesn't work on all C-64:s. The features supported are hidden vectors (naturally), glenz vectors (transparent surfaces), blenk vectors (shaded to the respect of the z-axis), changing objects and stencil fill. There are pretty many objects just to show that everything is in real time and could not be precalculated. Some of the objects have a lot of surfaces and that's just because the same objects were seen on Amiga 500 and the purpose was to show that the old C-64 can do the same (well the speed is not the same at all). All traditional regular polyhedrons including dodekahedron and ikosahedron are presented. There is also a logo in the upper part of the screen which happens to be the same logo as in the final part os Attack of Stubidos part one. So it is drawn by Napalm. The classic music was composed by Prosonix."