Do we get the source files?

Maybe it would be worth asking Nival for the Heroes 5 engine? The idea is that it doesn't belong to Ubisoft, and it could be used to expand the game's capabilities without the source code. (I want decent graphics that would match the level of games from 2008-2010, not the outdated graphics they made in 2004. Apart from the smoothing, which doesn't work with transparent textures, and anisotropic filtering, they didn't add anything else, although that kind of graphics would have been relevant for 2004, but not for 2008, when the last expansion was released).