I decided to use the same tracing technique i had used for my creature piece for this image, but i had only reached the point you see in the image above before i decided to take a new approach.
Given the relatively simple appearance of my refined image i believed i could get away with the use of circles sized and shaped to match my image.
Above you can see an image that better portrays what i was trying to do, i made use of a single perspective line to correctly proportion the crafts outline as well as the rings.
When i was happy with the lines i decided to try using the gradient tool to give the ring a convincing 3d appearance. Through crafty use of the selection tool which allowed me to only create the gradient where i wanted it to be, i believe i managed to pull this off quite well.
I then went on to use the circle outline to add some detail to the ship. I used the brush tool to create the lines you can see extending between the rings.
Here's a close up of some finer detail i added.
The final part of the line work was to erase parts that needn't be there.
As you can see, a lot changed between screenshots here. I started by adding the dark background, and moved on to adding some colour and shading to the ship using the gradient tool and some brush work. Finally, I went over this colour base with a square brush to create the slightly more interesting appearance for the ship.
I felt the ship needed to be more interesting in appearance, so i used goodle to find the circular pattern you see above. After taking it into Photoshop i used the 'Colour Range' selection tool to remove the white from the image, and then used the 'Expand' option to make the lines thinner.
I then pasted the refined pattern in to my main image and manipulated it into place, reducing the opacity to make it blend in better.
I then decided to add some texture to the ring, i again used google to find a suitable image, before taking it into Photoshop. In this case, it was necessary to duplicate the image vertically to streamline the process, though i felt no need to blend the images together. I even ignored the watermark in the corner of the original image.
After moving the image across, i then made use of the very useful 'Warp' tool to stretch the image into place.
As you can see in this image i had a change of heart about placing the warped image on the outside of the ring, i decided it was more fitting on the inside of the ring.
The next thing i did was add some shading to the ring using the simple gradient shown above.
Here's the result, i believe its a great improvement.
After this, and being satisfied with the shading (minus the black windows i added between shots), i proceeded to start experimenting with the colour, settling for a faint green on the space ship and a dark, steely blue for the ring. To achieve this i simply colourised the layers on which each object was located and then messed around with the colours til i had something i was happy with.
Finally, i borrowed a space image i found on google to use as my background, then used the same technique of colourisation to find something that complemented the colours already in the picture.
After this i moved on to the final details which included the beams that are firing from the spaceship which i made simply using some careful brush work, and minor details like the tiny red lights, the glint on the window and the blue thrusters.
Below is my final, object concept piece in all it's glory:
I am very happy with this final piece, i believe it shows a far more polished final outcome than my creature concept, even though i used much simpler, refined techniques to create it. I also believe that with more time it could look even better, but then this is only supposed to be a concept image. If i were to change anything it would most likely be the beams as i feel my original concept portrayed more of an arcing bolt of electricity activating the warp drive. I also feel that this image doesnt demonstrate an obvious sense of scale to it, i believe this can be attributed to the very focussed, centralised nature of my image, had i used a different layout i believe i could have resolved this particular problem.