How “Apply in UE5” Works

Generating in the browser is half the story — the other half is the result landing in your actual project. Every Apply in UE5 button on the web tools uses the same bridge:

The chain

  1. You click Apply in UE5 on a web tool (a generated Blueprint, material, world or rigged character).
  2. The browser opens a cosindra:// link — your OS asks to open it with the Cosindra desktop app.
  3. The desktop app fetches the generated result from your account and hands it to the CosindraMCP plugin.
  4. The plugin builds it inside your open editor: Blueprints as real node graphs, materials with textures wired, worlds as terrain + vegetation + lighting built into a new level, characters as imported skeletal meshes.

What it needs

  • The desktop app installed and running, signed into the same account as the website (a cross-account apply fails with a hint about the mismatch).
  • Your project connected and the editor open.

Nothing happened?

If the browser prompt never appears, the desktop app likely isn’t installed on this machine — grab it from the download page. If the prompt appears but nothing lands in the editor, make sure the app is running with your project connected, and check the editor’s Output Log for CosindraMCP lines.

Try the loop end to end

Generate a Blueprint in the browser, then watch it appear in your editor as a real, compiled graph.

Open BlueprintStudio