So I e-mailed Mr. Hescox about using his concept art for a game mod and this was his reply:
Dear Levi,
I am very pleased that you like my designs. I had high hopes for that game project.
As much as I would like to see my designs brought into existence in a mod, the copyright to the designs are deeply tied up in the corporate grip of Microsoft who owned the project before it was canceled. There is no way that I can grant that permission.
Sorry,
Richard Hescox
triffid@charter.net
www.richardhescox.com
I was wondering if I could e-mail FASA studios about this and see if they can give us their blessing? Or do you want to keep this under radar? I don't have to name the project or anything but I could do a quick generic e-mail that was like, "Wow, that Richard Hescox did some great art for the canceled Mw5. Would you guys care if we used it for a not-for-profit game mod?"
FASA Studios has always been super cool about letting mods use BattleTech/MechWarrior related stuff as long as it doesn't turn a profit.