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Mod Development Limitations

API Limitations​

For security or technical reasons, the current version restricts mods from accessing certain APIs at runtime.

Packages Blocked at Runtime​

  • UnityEditor
  • Mono.Cecil
  • UMod-ModTools

Namespaces Blocked at Runtime​

  • System.IO.*
  • System.Reflection
  • System.Reflection.Emit
  • Vexe.Fast.Reflection
  • System.Runtime.InteropServices
  • RoslynCSharp
  • RoslynCSharp.*
  • UMod.AssetSharing
  • UMod.Bridge
  • UMod.Debugging
  • UMod.Moddable
  • UMod.Moddable.Providers
  • UMod.Scripting
  • UMod.Scripting.Runtime
  • UMod.Settings

Types Blocked at Runtime​

  • System.AppDomain
  • System.Threading.Process
  • System.Diagnostics.Process
  • UMod.Mod (except UMod.ModHost)

Members Blocked at Runtime​

  • UnityEngine.Application.Quit
  • UMod.ModHost.AllLoadedModHosts
  • UMod.ModHost.AllModHosts

Members with Modified Runtime Behavior​

This version introduces a new security mechanism. Some Unity APIs will be removed from the restricted API list, but calls to these APIs will still be subject to certain restrictions. We will continue working to make more APIs available.

  • UnityEngine.Application.OpenURL (The deprecated restricted API Warudo.Core.Utils.ApplicationHelper.SafeOpenURL now directly calls UnityEngine.Application.OpenURL without modification.)

    • This API now only allows the http, https, mailto, and file protocols.
    • The URL must be a fully qualified URL.
    • When using the file protocol, only existing files and directories located within the Warudo data directory may be accessed.
    • Access to the Binaries, Clients, Playground, and Plugins directories within the Warudo data directory, including all of their subdirectories, is prohibited.
    • Parent-directory traversal using paths such as . or .. is prohibited.

Members Allowed in Relaxed Mode​

As this version introduces a new mod loading mechanism, certain potentially risky APIs may now be used with the user's consent.

None yet.

주의

P/Invoke is disabled globally.

Shader Limitations​

You can use custom shaders in Built-in Render Pipeline (BiRP) mode.

In Warudo Pro's Universal Render Pipeline (URP) mode, shaders that use Render Features are not currently supported out of the box. The shader author must contact our technical support team to arrange compatibility support. This limitation may change in the future.

The following URP shaders are currently supported:

  • Unity's built-in URP shaders
  • NiloToon
  • PotaToon

About These Limitations​

We are continually improving the Warudo mod development experience. In future releases, we may remove some restrictions, control access by rewriting affected functions, and provide more alternatives. We also plan to offer solutions for special use cases that currently require bypassing these limitations.

Contributions

Edit on Github

Authors

LiYin
Last updated on 2026.09.19