Does UE4 use directx or opengl?

Development Platform & Builds
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1

Hi, does UE4 use directx or opengl? If UE4 use only one of them, is it possible to use another from the box or require hard work?

2

Do you mean the Editor? If not, modern game engines use all off them GL, GLES, GLES2, DirectX9, DirectX11…etc. Also editor probably configurable.

3

i mean packaged game in UE4, will run with DirectX or OpenGL?

4

Depends on your settings. Unless you override it, on Windows it will use DX11.

5

How do you override it to use OpenGL? I’ve tried but have not figured out how to do it

6

You can launch the project from the command line forcing OpenGL if you add the argument -opengl3. Don’t forget to select OpenGL3 in Project Settings > Windows.