Alright, I think it's about time I pay my respects to this excellent artwork. You make THIS in a few days for a competition? Pure brilliance. I think the other one is more aesthetically pleasing but this one feels more atmospheric and fits more with the track I've made for the contest myself, so I'll leave this one a review!
Right, first off, the colours are so tastefully chosen. You managed to nail such a beautiful contrast between the brown of the landscape and the pale blue of the dome that truly highlights the fact that the humans are outsiders to this planet. The sky looks gorgeous by the way.
There truly is a sense of majesty from that dome which one would expect from a beautiful nature landscape and not from a man-made structure. One of my favourite things about this artwork is that shine you put on the dome's surface. What an excellent idea. I'd assume it's coming from the sun but whatever the case you cleverly gave it a colder shine rather than the warm light rays I'd imagine coming from the sun, which fits flawlessly.
AND THE RESOLUTION, SWEET JESUS. This is MASSIVE. It looks great no matter how far you zoom in, making it such a great desktop background (literally the only reason why I don't have it as a desktop background myself is the fact that I pretty much exclusively use music-related desktop backgrounds). The amount of work and detail you put into it really shines through.
Despite all that detail and blend of colours, you still manage to keep it looking incredibly artistic and inspiring, rather than being too realistic. Now, this might be hard to explain, but I love how the somehow two-dimensional overviews of the barren rocks and flora sort of separate the picture into different and visibly-separated layers of depth; in this sense it reminds me a bit of Okami's art style, although not as exaggerated as Okami's (if you played the game you might know what I mean). I also like how when you zoom in you can actually recognise the brush strokes, giving this art piece a unique artistic flair over some super-realistic computer-generated interpretation of a hostile planet.
Overall, you've set out with a goal to inspire the contestants and your approach to this goal is stellar. At least, it definitely inspired me, and I'm pretty sure the track Echo and I collaborated on for this contest wouldn't have been nearly as good if it wasn't for such a great art submission being the foundation of it. Perhaps this review ended up being too bloated with praise but at this point I don't really care, you've certainly done the contest justice!