The plugin isn’t installed by default in 4.25. You need to :
- Download 4.25 on Github and place it in a folder that is close to your disk’s root (if the path is too long, the download/compilation will fail)
- Modify the UE4Editor.Target.cs file located in YourDisk\YourPathToTheEngine\UnrealEngine-4.25.3-release\Engine\Source\UE4Editor.Target.cs by adding these lines to build & activate Chaos :
bCompileChaos = true;
bUseChaos = true;
**I did not follow the documentation, I did not replace
BuildEnvironment = TargetBuildEnvironment.Shared;
with
BuildEnvironment = TargetBuildEnvironment.Unique;
because it doesn’t work.**
- Build the engine
- Launch it from Visual Studio by debugging or use YourDisk\YourPathToTheEngine\UnrealEngine-4.25.3-release\Engine\Binaries\Win64\UE4Editor.exe and create a new project
- This is normal if you can’t launch the project. In this case, open the file YourDisk\PathToYourProject\YourProjectName\Source\YourProjectEditor.Target.cs and add :
bCompileChaos = true;
bUseChaos = true;
(That’s another thing you can’t find in the documentation…)
-
Save the file, restart the editor, launch the project, and then you have to go in the plugins manager to activate all these plugins :
-
Chaos Editor
-
Chaos Solver
-
Chaos Niagara
-
Planar Cut
-
Editable Mesh
-
Geometry
-
Geometry Cache
-
Field System
- Restart the editor to activate the plugins
- Open the fracture mode using the buttons I circled in red in the screenshot.
About using it for a project, it’s not recommended in 4.25. Use 4.26 instead.