Demos are broken out-of-the-box in a default Unity 6 URP project

[supwang]

Demos are broken out-of-the-box in a default Unity 6 URP project.

Repro: Unity 6 Hub -> New Project -> "Universal 3D" template (defaults to URP

• Active Input Handling = Input System only) -> import FishNet -> open any demo
  scene -> Play.

Result:

1. All demo materials render magenta (they use Built-in RP shaders, not URP).
2. Demo scripts use the legacy UnityEngine.Input API, so they throw
   InvalidOperationException every frame; players never spawn and nothing moves.

Networking itself works fine -- I only confirmed that by finding
"Local client is started for Tugboat." in the Editor log.

Suggestion: either ship URP variants of the demo materials and migrate demo
input to the Input System, or put a note in Getting Started saying the demos
target Built-in RP + legacy input. As-is, a first-time user on a default
Unity 6 project sees a magenta screen full of exceptions and reasonably
concludes the package is broken.

4.7.2R（Asset Store 版，2026-04-17）
6000.3.21f1（Unity 6.3 LTS）
Windows（Editor，DX12）
Free Version