UPD: Download LINK! https://cloud.mail.ru/public/AzuA/RSoGRemMt (Press blue button Скачать файл)
As we all know, Dishonored 1 uses Unreal Engine 3, so hard to modding engine, in that you probably even won't able to launch custom map! I thought the same, until i tried to launch some UT3 map under Dishonored myself.
Result is so awesome - about 95% of maps, that i downloaded just crash the game with "Fatal Error" and "Ran out of Memory", but 5% even so launched! YES! - Alien UE3 map from alien UE3 game is works under Dishonored
What this mean at all? - This is some answer to the qestion about possibility of modding Dishonored and other games, that uses UE3 (BioShock Infinite, Borderlands 2, Alice Madness Return, Thief)
But one important note - In Dishonored is not removed dev console, so i able to launch maps via "OPEN" command, as example, in BioShock Infinite, those console is removed and i have no chance to launch it from command line
Secound note - yeah, here is no textures, why? - Probably textures stores in some default packages of UT3, few year ago i already tried to load textures from UT3 (.tfc) in Dishonored, but no chances, it load only Textures.tfc, because Dishonored is "CookedPCConsole" game, where is engine so cutted out
I hope my video has cheered you up, and modders have warmed up interest in this game