Docs: GPL-3.0-or-later (creator ruling); AI-generated scene backgrounds + alert video are GPL placeholders, not reserved; TASK 51 UI spec — Remove/Blur as radio-exclusive pill switches in the webcam's Layers properties (Unit: license follow-up + bg-effects UI spec)

ADDITIONAL-TERMS.md

@@ -3,8 +3,9 @@
 Copyright (C) 2026 Gramps — https://llamacasty.com
 
 LlamaCasty is free software: you can redistribute it and/or modify it under the terms of the
-**GNU General Public License, version 3** (GPL-3.0-only), as published by the Free Software
-Foundation, together with the additional terms below, which section 7 of that license permits.
+**GNU General Public License as published by the Free Software Foundation, either version 3 of
+the License, or (at your option) any later version** (GPL-3.0-or-later), together with the
+additional terms below, which section 7 of that license permits.
 The full license text is in [`LICENSE`](LICENSE).
 
 LlamaCasty is distributed in the hope that it will be useful, but **WITHOUT ANY WARRANTY**;
@@ -44,3 +45,10 @@ covered by GPL-3.0:
 Unmodified copies of LlamaCasty may be redistributed with these files included. Modified versions
 must replace them with their own artwork. No other use — including on merchandise — is permitted
 without written permission.
+
+## Placeholder artwork — licensed with the code
+
+The scene background images (`Assets/*-background.jpg`) and the default alert video
+(`Assets/alert-default.mp4`) are AI-generated placeholders, there so the app works the moment it
+opens. Creators are expected to replace them with their own. They are distributed with the code
+under GPL-3.0-or-later and carry none of the restrictions above.