indeed there are ships from other games... i carefully took what i was allowed to take and what does fit into the game
the firefly transport (aka serenity) was meant to be included to this mod as part of a quest
however these quests did not make it into the final release due to time troubles but they will be made available via DLC
So the ship will come... sooner or later.
not only the cfbomber1, the cddifhter2, the lightbringerbomber are from that guy, about 20 others (all order ships except the new prototype) are also from him
These ships we offered to me for exclusive use in Crossfire in the manner "I love your mod, ive a few ship models, take them, texture them and do whatever you want to do with them". So i did.
If you scroll back the threads a few years you will even find a long conversation about texturing those ships between the original creator of the models and me.
If giving credits would have been requested then it for sure would have been done.
If you wonder why there are FS2 ships in CF, I took them because they fit into the mod and because they are from a public source since volition gave explicit permission to use that stuff before the company was closed.
In case of the SF2 ships, well, lets say it this way... I know the Provox lead designer that has build the game and there are pretty good relations.
Then there is one Star Wars ship... but that falls completly under the "fan art" conditions and credits are given.
And finally the Star Wolves models. Under which conditions I got the permission to use them is nobodies business. All that matters is that i can use them.
All other ships are of course credited.