Enlighten UE4 3.12 is based on Unreal Engine 4.25.0 and UE4.26.0.

Enlighten UE4 is distributed as a collection of .zip files containing modifications to the base UE4 version. The distribution .zip files are named as follows:

Version is the version of Enlighten. This comprises:

• the Enlighten version number

• R denotes the initial release; Pn denotes patch n

• the internal build number

UE4 Version is the version of UE4 this package is compatible with

Type may be:

• Base — Required. This zip contains the modified engine files and the Enlighten libraries and tools.

• Samples — This zip contains maps and assets demonstrating Enlighten, contained in EnlightenSamples.uproject.

• Platform specific files — Extra files required to run on console platforms. These are provided only to registered platform developers.

For example EnlightenUE4-3.12.R.12345-UE4.26.0-Base.zip contains the Base files for the initial release of Enlighten UE4 version 3.12 compatible with UE4 version 4.26.0.

The Enlighten Precompute requires a valid Enlighten license. Please place the license file in Engine/Binaries/ThirdParty/Enlighten.

Each licence file is valid for a limited period.  For licensing support, contact Enlighten Support.

To build the Enlighten UE4 editor:

1. Install an unmodified copy of a supported version of UE4. This must be the major release, not a hotfix.

2. Download the Enlighten packages compatible with your UE4 version.

3. Extract the Enlighten packages on top of your unmodified copy of UE4, overwriting files where necessary.

4. Delete the Engine/Intermediate folder, if it exists.

5. Run GenerateProjectFiles.bat.

6. Rebuild at least the following projects:

   1. UnrealFrontend Development Win64

   2. UnrealLightmass Development Win64

   3. ShaderCompileWorker Development Win64

   4. UE4 Development Editor Win64

To evaluate Enlighten with a hotfix release of UE4 you can perform a three way merge between:

• Left: your UE4 source tree with the hotfix

• Right: the base UE4 + Enlighten source tree.

• Common Ancestor: the unmodified copy of UE4.

Visual Studio 2017 - MSVC 14.16

Visual Studio 2019 - MSVC 14.28