Your entry really caught my eye last year. I think overall is a great concept n i like it personally.
While loving the concept, I think u also find a very interesting way of creating such effect in modeling (I dunno what u use, glue? Wax?), hence a little personal opinion on execution:
1. in modeling, even in a diorama, everything should be carefully planned and crafted. In other words, anything found in the dio should be thing that u want it there, for a purpose. In competition, not only the maker knows it, he need to convey that message to his audience/judge too.
There r tons of details in the vignette/dio, which many of them I believe u have put in a lot of effort to create them, but there r also quite a fair bit that, at least to my observation, looks kinda "random" without an intension
2. Due to the above reason, there is another way to further enforce the idea that u actually carefully plan every details, it is always good to have a little more contrast. For example, now majority of your dio details are tends to be more random, roundish, and bio-feel; u can try at least a few parts, u put in extra effort to make them clean n sharp; a more mechanical finish. This is further enhance the idea that everything is roundish n bio-like is result of ur carefully planned product.
Example would be the mechanical armor of the Nemo. Instead of all being half way demonized, u can purposely leave a few parts with sharp n crisp edges.
3. Sizes of detailing. While u have loads of details in the dio, i still find most of them are about the same size. I would recommend a more variety in the sizes of detailing. This is also, as for the same purpose, to let others know that u choose the sizes of detailings with intentions.
For example: the last photo: the thing with the green LED light. I m not sure what material u use to create that (Personally i think it's pretty well done), right now, it consist almost all the same size of details. Lets say the size is medium (M), i would recommend u put in some small(S) or even extra small (XS) detailing. this will eliminate others might have the wrong impression u did this in a rush.
4. Besides sizes, i would also recommend variationin colors. A few different color here n there, or even a few slimmer thing that is transparent (without color) would add to the depth to the overall.
5. HR Giger is a very famous artist and with a style can be easily recognized. If u r going to do something inspired by the artist, either u do it with quite a big amount of variation. If u r going to follow majority of his art, make sure u gonna do it better, or at least on par to that.
Since we r talking about Giger, here's an example on what i was talking above: mixture of blur edge n definite edge, color variation, different sizes details.
Just my 2 cents worth. Pardon me for talking too much.
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