Welcome to the special episode, where we’ll show you how to download the Developer Tools and share your project on Steam Workshop. To use the Developer Tools you need to have Steam, and have Dying Light installed on your Steam account. After installing Dying Light, in Library>Tools you will be able to find ‘Dying Light Developer Tools’, which we’ll install the same way we install any game in our Steam library.
We now have Dying Light Developer Tools in our system. Ok, so how do we share a finished map? You can upload it to the Steam Workshop by going to ‘Document’ menu and selecting ‘share’. From the list, we select ‘create new item’ add a name for our project, set its visibility for other users on Steam Workshop, prepare a screenshot, and send it onto Steam Workshop by clicking Submit..
As found on Youtube