HwKeeper
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A fan-made random map generator for Heroes 5 has appeared: HoMM 5 Random Map Generator (the author of the generator is Tapani Utriainen). According to the author himself, generating large maps takes a lot of time and requires a powerful computer for good performance.
You can read about all the settings in the attached file readme.txt. The only drawback of the editor is that it generates maps only for 2 players, but this is version 0.7, and perhaps the final version will have more features; moreover, by that time, an official editor will also be available, which will be included in the add-on Heroes 5: Hammers of Fate, which will appear very soon (the magazine "Navigator of the Gaming World" indicates the release date of the add-on as November 20th).
You can download the editor here.
You can read about all the settings in the attached file readme.txt. The only drawback of the editor is that it generates maps only for 2 players, but this is version 0.7, and perhaps the final version will have more features; moreover, by that time, an official editor will also be available, which will be included in the add-on Heroes 5: Hammers of Fate, which will appear very soon (the magazine "Navigator of the Gaming World" indicates the release date of the add-on as November 20th).
You can download the editor here.