Time for a new tutorial methinks:
Ambient Occlusion Baking
After playing around with some AAA game engines I noticed that they have something that Oolite does not have (well, actually they have many things Oolite does not have, mainly because Oolite does not need it). A thing called "Ambient Occlusion", in real life you will notice it only as shadows under cars for example:
however often it's far more subtle...
this is a very easy effect to do in blender:
1) first make your lovely spaceship:
2) UV unwrap it and create a blank texture for it of your desired size (for this step it is better to choose double the size you want then scale it down in you image editing software of choice)
3) in the properties tab choose the render sub-tab and pan all the way to the right you will find a sub-sub-tab named "bake" (it might not be expanded, if not just click the arrow to expand it),
set bake mode to ambient occlusion (important: you must not have any lamps in your setup or this will not work, if you don't know what lamps are don't worry, you probably don't have any),
then simply click "bake"
your blank image should change into something like the image below, if it doesn't you've missed something.
then simply view it in texture paint mode, you should have some lovely subtle shadows:
then in your image editing software of choice, just place this in the layer above your diffuse map and set blend mode to "multiply"