Craftworlds: form, function and 'colour text'...?

I'm in the midst of creating a 'thing' elsewhere, and once again returned to the concept of what a craftworld was 'like'? I'm not talking about the external shape or even the size, but the internal structure and how it relates to not only function as stated in the 'fluff', but also the far more interesting fan assignment of function (which tends to make more sense since it is not inherently focussed on the image at the expense of verisimilitude).

So what would I like? Well, discussion about the internal form and layout of a craftworld. How do people imagine it? Do you have any example artwork, either official or otherwise, that you find particularly inspiring? Regardless of that, how do you describe the internal portions of a craftworld?

Consider, for example, that GW tends to concentrate on the concept of the 'dome' which may or may not communicate (i.e. open out onto space in terms of a 'window' of crystal or force). Now, I personally extend this to suggest that craftworlds have - now, at least - an inherently honeycomb structure. The nature of each unit is debateable, though I tend towards octahedrons (maybe not) or dodecahedrons of varying size. The average unit size of a 'dome' increases as one approaches the centre of the craftworld, an area more traditionally associated with the vast 'lungs' of a craftworld (the biodomes, or what I refer to as seorsa'men). Towards the edges, of course, the 'domes' begin to get smaller as increased compartmentalisation is required, more specifically because these are the nominal 'industrial areas'.

Of course, this works only in general. Small 'domes' would surround the larger domes at the centre so as to prevent rapid decompression/evacuation of the air in terms of massive breach... Larger domes would be present towards the outside, even 'open domes' to allow landing of ships, etc.

Obviously the 'domes' don't sit flush to each other, but are rather separated by interstitial volumes that act as the 'vascular' system (to perpetuate a standard GW image), etc. This includes the 'transit tunnels' (automated), walkways, etc.

One obvious implication is that you're going to have a 3d structure where you walk up the 'side' of one dome, 'underneath' another, etc. With eldar gravitic technology it would even be possible to have a 'dome' where 'down' is actually at your feet regardless of whether you're at the 'top' or the 'bottom' of the dome...

Personally speaking, the important 'biodomes' tend to communicate with the external environment. They are designed to be reminscent of homeworlds, after all. (Indeed, different pressures are maintained in these such that one can get 'natural breezes', as an example of their interconnectivity...) Other domes, however, do not communicate with the exterior. Rather they are entirely interior with the use of holographic (or the technomantic equivalent!) skies, etc.

So, suggestions on the refinement and inappropriateness of this concept are welcome. (And, just in case, yes I do know about the origin of craftworlds. But like bone remodels itself, so to has the overall form of the craftworld been changed from their origins...)

With that said, does anyone out there have specific 'locale' descriptions for their craftworlds? This is the 'colour text' that I'm after for subsequent work on another project, and I'm looking for inspiration...

Kage