clouds from the bottom look flat, and flame from rocket is not realistic, other than that it's a nice image.

The clouds look just the way they do in the source image

perhaps they look like that because it's photographed from below, but in your image to fit the perspective you shuold have some clouds photographed from above. i'm not even sure i'm right about that, but something is deffinitely not righdt. the way it is now, the clouds have too little detail to give real value to the image. for me atleast.

this is true, one way you could increase definition on those clouds is by duplicating scaling and rotating the existing clouds or the easier way would be to get a free cloud brush from DA. otherwise a dreamy image
edit: i'll explain myself, the clouds in front of the structure that you created look like there is a powerful light source right behind them while in your image there is city behind it even if the light source was there it would cast a shadow on the cloud but now if the light source where to be above everything just like it seems to be in your image the clouds would look like the image here http://alphabettr.com/images/cloud.jpg so that is what i mean when i say i think the clouds need more definition.
Still a very nice and creative image

I think it would look cooler with a brighter sky maybe deep blue...IMO but nice use of your sources the tower thingy looks good the saucer down front right could use some tweaking...nice work

Inanis & slayyou, I'm sure you think you know what you're talking about...I don't.
@ lchappel,, there's no saucer down left. The one down right is blurred because the background is in focus.

Looks nice!

this looks awesome! all the sources are combined pretty well. the color is great too, it matches the sterile-looking cloud city idea

very nice mood

Lovely image, futurism ftw

Nice, rocket does look a bit dull.

Wow...Well done

cool...gl

Very Nice Author

Very nice entry.

and congrats again.

And also congrats for the second!

Congratulations for 2nd too, nice one.

Congrats!