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How To Solved Package Size Problem

April 27, 2025About 3 minUnreal Engine

How To Solved Package Size Problem

进行以下操作可以减少包体：

Prerequistes

关闭预先要求的软件：

Disable Default Plugins

  • OpenImageDenoise：用于视频生产的光线追踪

在Uproject文件中可以直接全部关闭引擎的插件，然后手动管理你所需要的插件：

Project Setting Packaging

开启以下选项可以降低包体大小：

  • Use Pak File：，使所有的资源打到一个包里
  • 保证Shader不被多次复制
    • Share Material Shader Code
    • Shared Material Native Librarie
  • Create compressed cooked packeges
  • Exclude editor content when cooking：去除编辑器下的文件内容
  • Full Rebuild：只需要在发布版本的时候开启，平时可以关闭，这样可以快速迭代。

设置只需要打包的地图：

Forward Render

在2D、VR、手机项目中可以开启该选项。既减少包体大小也可以提高性能，这会关闭一些功能：Nanite、Lumen等。

文档：Forward Shading Renderer

Default Pakistan File Rules

创建DefaultPakFileRules.ini文件在Config目录下，控制打包规则，决定那些文件需要被打包、压缩或排除。核心配置规则：

包含/排除规则

[PakFileRules]
; 包含指定路径的文件
+IncludePath="Content/Characters/**"
+IncludePath="Content/Levels/*.umap"

; 排除特定文件或通配符
-ExcludePath="Content/DevAssets/**"
-ExcludePath="*.tmp"
  • +IncludePath：强制包含匹配路径的文件。
  • -ExcludePath：排除匹配路径的文件（优先级高于包含规则）。

压缩规则

[Compression]
; 对特定文件启用压缩
+CompressExt=.png
+CompressExt=.uasset

; 禁用压缩的文件类型
-CompressExt=.wav
  • 可针对文件扩展名设置是否压缩（如已压缩的音频通常无需再压缩）。

加密规则

[Encryption]
; 加密特定文件
+EncryptFile="Content/Blueprints/SecretBP.uasset"
+EncryptWildcard="Content/Cinematics/*.mp4"
  • 保护敏感资源，防止玩家直接解包PAK文件获取内容。

其他规则

[Options]
; 是否将PAK文件拆分为多个小块（用于流式加载）
bSplitPakFiles=true
MaxChunkSize=2GB

以下是一个简单的例子，来源:

[ExcludeDefault]
Targets="Shipping,Development,Debug"
bExcludeFromPaks=true
bOverrideChunkManifest=true

+Files=".../Engine/Content/ArtTools/"
+Files=".../Engine/Content/EditorLandscapeResources/"
+Files=".../Engine/Content/EditorMeshes/ColorCalibrator/"
+Files=".../Engine/Content/EngineSounds/"
+Files=".../Engine/Content/Maps/"
+Files=".../Engine/Content/MobileResources/"
+Files=".../Engine/Content/Slate/Automation/"
+Files=".../Engine/Content/Slate/Common/"
+Files=".../Engine/Content/Slate/CrashTracker/"
+Files=".../Engine/Content/Slate/Docking/"
+Files=".../Engine/Content/Slate/Fonts/DroidSansFallback.ttf"
+Files=".../Engine/Content/Slate/Icons/"
+Files=".../Engine/Content/Slate/MessageLog/"
+Files=".../Engine/Content/Slate/Old/"
+Files=".../Engine/Content/Slate/Testing/"
+Files=".../Engine/Content/Slate/Tutorials/"
+Files=".../Engine/Content/Tutorial/"
+Files=".../Engine/Content/VREditor/"
+Files=".../Engine/Content/EditorMeshes/Camera/SM_CraneRig_Arm.*"
+Files=".../Engine/Content/EditorMeshes/Camera/SM_CraneRig_Base.*"
+Files=".../Engine/Content/EditorMeshes/Camera/SM_CraneRig_Body.*"
+Files=".../Engine/Content/EditorMeshes/Camera/SM_CraneRig_Mount.*"
+Files=".../Engine/Content/EditorMeshes/Camera/SM_RailRig_Mount.*"
+Files=".../Engine/Content/EditorMeshes/Camera/SM_RailRig_Track.*"
+Files=".../Engine/Content/EditorMaterials/MAT_Groups_Toggle.*"
+Files=".../Engine/Content/EditorMaterials/MAT_Groups_Visibility.*"
+Files=".../Engine/Content/EditorMaterials/PreviewShadowIndicator.*"
+Files=".../Engine/Content/EditorMaterials/PreviewShadowIndicatorMaterial.*"
+Files=".../Engine/Content/EditorMaterials/MatineeGroups/MAT_ColorTrack.*"
+Files=".../Engine/Content/EditorMaterials/MatineeGroups/MAT_Groups_Anim.*"
+Files=".../Engine/Content/EditorMaterials/MatineeGroups/MAT_Groups_AudioMaster.*"
+Files=".../Engine/Content/EditorMaterials/MatineeGroups/MAT_Groups_Director.*"
+Files=".../Engine/Content/EditorMaterials/MatineeGroups/MAT_Groups_Event.*"
+Files=".../Engine/Content/EditorMaterials/MatineeGroups/MAT_Groups_Fade.*"
+Files=".../Engine/Content/EditorMaterials/MatineeGroups/MAT_Groups_Float.*"
+Files=".../Engine/Content/EditorMaterials/MatineeGroups/MAT_Groups_Move.*"
+Files=".../Engine/Content/EditorMaterials/MatineeGroups/MAT_Groups_Slomo.*"
+Files=".../Engine/Content/EditorMaterials/MatineeGroups/MAT_Groups_Sound.*"
+Files=".../Engine/Content/EditorMaterials/MatineeGroups/MAT_Groups_Vector.*"
+Files=".../Engine/Content/EditorMaterials/ParticleSystems/PSysThumbnail_NoImage.*"
+Files=".../Engine/Content/EditorMaterials/ParticleSystems/PSysThumbnail_OOD.*"
+Files=".../Engine/Content/EditorMaterials/Camera/CineMat.*"
+Files=".../Engine/Content/EditorMaterials/Camera/MI_CineMat_Rig.*"

; Frees up 3 MB but can't use bloom and might have other risks
+Files=".../Engine/Content/EngineMaterials/DefaultBloomKernel.*"

; Frees up 1 MB and seems to work
+Files=".../Engine/Content/EngineMaterials/DefaultCalibrationGrayscale.*"

; Frees up 6 MB abut can't use substrate
+Files=".../Engine/Content/EngineMaterials/Substrate/"

; Frees up 1 MB and seems to work
+Files=".../Engine/Content/Localization/"

; Frees up 2 MB and seems to work if you don't have text
+Files=".../Engine/Content/EngineFonts/"

Reference