[Bug] Unity 6 Sprite Preview Error: Crop rectangle exceeds source bounds & Scrambled Texture Decoding

[ETeyondLitle0721]

Describe the bug

When attempting to preview a Sprite asset from a Unity 6 bundle, the application throws an ArgumentException regarding cropRectangle. Additionally, the source Texture2D assets are not being decoded correctly, appearing as scrambled "puzzle pieces." This indicates a potential serialization or tiling issue with this specific Unity version's texture format.

To Reproduce

1. Open AssetStudio.GUI.exe (v2.4.0).
2. Load the bundle file: yuki.bundle.
3. Switch to the Asset List tab and filter by Type: Sprite.
4. Click on a Sprite (e.g., Sprite ID 19) to preview it.
5. Observed Error: The Log window shows Crop rectangle should be smaller than the source bounds.
6. Observed Texture: The corresponding Texture2D appears scrambled/tiled incorrectly.

Expected behavior

The Texture2D should be decoded properly, and the Sprite should be correctly cropped and displayed in the preview pane without errors.

Screenshots

1. Sprite Preview Exception

2. Scrambled Texture (Decoding Issue)

Version

v2.4.0 (Multi-threaded)

Unity Version

6000.0.48f1

Sample

• Game Name: 魔法少女ノ魔女裁判 (Magical Girl Witch Trial)
• Sample File: yuki.bundle (Google Drive)

Additional context

1. Stack Trace: The error occurs at AssetStudio.Utility\SpriteHelper.cs:line 55 within the CutImage method.
2. Analysis: The Crop rectangle error appears to be a secondary symptom. Since the source Texture2D is not being reconstructed correctly (as seen in the "puzzle" effect), the metadata or UV coordinates are likely being misinterpreted by the current Unity 6 parser.
3. Environment: This is a Unity 6 (6000.x) project using Naninovel assets.

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This issue was drafted with the assistance of Gemini (AI thought partner).