Ok, just my opinion on what looks to be the new contest structure,
It seems from a simple suggestion on the poly count limit has brought in a whole new set of rules that in my opinion seem to just complicate a simple forum modeling comp beyond that what it needs be(no offence Musashi).
While I like watching these contests and most recently participating in them, it now looks like it would be extra work just to enter.
I agree with showing w.i.p shots but showing reference pics I'm not too sure about as some here might not even do or use reference pics for these comps.
I do for other projects etc but for my first entry(the weapon,gun) I used no reference pics or pre design sketches, I just done it off the top of my head, made it up as I went along.
So would I not of been able to enter that model if I had no ref/design sketches?
As for the Rendering in a game engine rule, I think we should just keep things simple. For those having to download demos(usually with a trial!) and then figure out how to import their model into the engine just to get a rendered shot of it seems a bit much, even for those with full engines.
And also just like modeling apps, engines have different rendering capabilities, along with recommended poly counts etc.
I don't see a big difference rendering it in an engine.
I think you should be able to render it in your 3d app, but have it in a plain scene, no eye candy, a couple of shots from the front, back etc and a few close ups.
And last but not least, texturing!
With work and other projects I don't always have time to texture some models and I'm sure there are others in the same boat. I also would not want to do a rush job just to get the model in on time. So would it not be better to let the modeler decide whether they want to enter their model textured or untextured?
I think its great to have a design outline like you mentioned, a weapon for a fear type game etc That will keep most on track.
Ok, that's it for now

So what you think???