Art for Mods (Intellectual Property question)

[Emperor's Child]

Question for the Mod Gurus:

I’m putting together a Mod based on the Warhammer / Battlefleet Gothic background, and found some online art released by the parent company as Computer Wallpaper that I’d like to use in the Into / Splash screen for the Mod.

I’m not sure if use of this art, though not for profit, is something that the company would object to. My gut feeling is that the company would not authorize this, but if we are not using this for profit is there anything they can say or do about it.

Is there a rule of thumb that you need to avoid using anything but your own art if you publicly release the mod? I’ve seen some shipsets and mods with what appear to be lifts from Movie related art material or art from other sources so I’m not sure what will or won’t get you into hot water.

I just want to get these issues sorted out before I put too much effort into areas that I can’t publicly use.