Mod requests (orders).

Max, what's the best level of detail? If modders port it to Unreal, the graphics will be amazing... but as it is, all the models are made of triangles... polygons consist of triangles...

Actually, you're wrong, you can improve the appearance by using the textures themselves. There are guys on the forum who made such mods, I know there are some, and it's not so much about the resolution of the textures, but about adding details, like armor or vegetation for the Orcs. About Heroes on a new engine, I know that the guys have taken on a big task, and there are doubts that they will be able to handle it (unless some company hires them to make a remaster). There's still a long way to go before it's finished, considering that the visual style is planned to be identical to the base version of Heroes, and I haven't seen any mods for the game on the Unreal engine.