@PJF
I've actually modelled by myself in Bryce this spaceship that apper as a tiny - and not so clear - spaceship in background of a huge spaceship in a Gambino illustration (as you and everybody can see).

So, following your reasoning, If I model a WWII Spitfire airplane or a WWII German tank (there are MANY of this kind of objects on sale on Renderosity),  is GOOD, but if I model a spaceship that is just a DETAIL in a illustration of Fred Gambino is BAD???
WHY???
Are you shure that your reasoning is really working or do you have a personal problem with me?