I thought I'd try drawing an alien vessel from my personal universe completely in photoshop and without the normal comic book lines style I usually draw in. And add some technical stuff so I have it down somewhere.
The vessel is that of the extragalactic enemy, the vore, who have a mission not dissimilar to the Tyranids from WH40k; eat everyone, harvest new genes, instigate vore supremacy everywhere.
This is their average capital ship, which is not a total bioship as you might imagine from looking at it. There is a lot of biology that goes into it, which is stretched over the metal hull, it serves as an extra layer of ablative armour and an extremely well tuned sublight sensor system. The big red "eyes" on it are the anti-capship beam weapons, easily capable of causing wide-scale destruction on a planet within minutes, revealing the planet's mantle, melting the crust, et al.
The big glowy thing on the bottom is supposed to be a weird light emitting superweapon, blows up planets, and with a few blasts can fuck up suns, blasting sizeable chunks off, and otherwise mess with the distribution of the system's gravity, causing large problems, should that course of action be required.
The peculiar horns on the top are shield pylons, the top of the vessel is completely smooth, and made out of the same material as the pylons.
The vessel is about 30 miles wide and the most common vessel of the vore fleet. They have insane accelleration (for the universe), and can approach within fractions of lightspeed in around 2 seconds, should they need to.
The power source, nobody knows, but it is known to be less than the vore's main rival's power generation from hypermatter-hyperantimatter reaction. A technology known only to the Kurgani, a reptilian species that's been at war with the vore for millenia.
Superliminal travel is, like most forms of ftl travel in my universe, hyperspace-based. There are different hyperspatial planes, each with their own set of physics, related to all the others, our plane of existence, the singularity source of the universe, and the planes of existence "below" ours. The weird planet you see in the background is the event horizon of the exit point of interdimensional travel.
My view of this universe can be summed up with the look of a cone. At the top, the singularity, the source of the universe, pure, universal energy in one infintesimally small point. Then it stretches out and on one plane within that cone is normal space, from our point of view. There are various other levels above and below ours where the natural chaos of the universe levels out into a stable plane that you can reach by the magic of the hyperdrive.
One point on one level will correspond to another point on another level, so by jumping to a higher plane, you can make the journey much faster. If you can jump to an even higher level (which takes far more energy) you can make an even quicker journey and have access to higher energy physics, with hypermatter corresponding to each hyperspatial level.
Of course, as well as spatial entities using these planes of existence, things have naturally evolved there too, so you've got to be careful.
