How to Create a Project in DOTS

Outside of the Unity Editor, navigate to your project folder and open manifest.json (inside the Packages folder) with Visual Studio code or your choice of editor. These are all the packages that are currently included in your project. Now you need to manually add a new package, the Hybrid Rendering package. Add the following line to the manifest somewhere between the curly braces and save: "com.unity.rendering.hybrid": "0.11.0-preview.42"

To use Unity’s DOTS technology, you need to create entities, components and systems. The process that "converts" GameObjects (authoring data) and generates entities and components (runtime data) is called conversion. This process is the preferred way of authoring ECS data. It is a fundamental part of DOTS, and not something temporary.

In Unity, you can convert GameObjects into Entities by creating "Sub Scenes." This is how it works: the GameObjects in a Sub Scene are automatically converted into Entities. This conversion takes place either when (1) you hit Play in Editor while the Sub Scene is open at the time, or when (2) you close the Sub Scene from its Inspector. How is this helpful? The main benefit of this approach is the ability to split your scene into several Sub Scenes and have every closed Sub Scene work in an "entity-performant world" (so to speak) while you work in/edit the open Sub Scenes that are in "GameObject world" (as long as those windows are opened!)