The Big Shell

Hi all.
This is an old 3d matte painting project that I want to call finished this weekend… it’s based on the concept art ‘The Big Shell’ by french artist Arnaud Caubel (image on the comments).
I also used the Shipyard v0.3 from GreyOxyde, downloaded from blendswap.

Would you give me some feedback ? All CC’s are more than welcome. Thanks guys !
Blender and Photoshop

It looks great but why is it so soft and low res? This could benefit greatly by making it cleaner and sharper.

I did some color tests in photoshop and this image has plenty of details and color but it got lost in the final render.

really amazing work!