diff --git a/src/AcDream.App/Rendering/GameWindow.cs b/src/AcDream.App/Rendering/GameWindow.cs
index ca4dcab..ddbfb34 100644
--- a/src/AcDream.App/Rendering/GameWindow.cs
+++ b/src/AcDream.App/Rendering/GameWindow.cs
@@ -27,7 +27,11 @@ public sealed class GameWindow : IDisposable
     private Shader? _meshShader;
     private TextureCache? _textureCache;
     private DebugLineRenderer? _debugLines;
-    private bool _debugCollisionVisible = true;
+    // K-fix4 (2026-04-26): default OFF. The orange BSP / green cylinder
+    // wireframes are noisy outdoors and confuse first-time users into
+    // thinking they're a rendering bug. Ctrl+F2 toggles, the DebugPanel
+    // → Diagnostics → "Toggle collision wires" button toggles too.
+    private bool _debugCollisionVisible = false;
     private int _debugDrawLogOnce = 0;
 
     // Phase I.2: the old StbTrueTypeSharp DebugOverlay was deleted in
diff --git a/src/AcDream.UI.Abstractions/Panels/Debug/DebugPanel.cs b/src/AcDream.UI.Abstractions/Panels/Debug/DebugPanel.cs
index e996a0d..dc55080 100644
--- a/src/AcDream.UI.Abstractions/Panels/Debug/DebugPanel.cs
+++ b/src/AcDream.UI.Abstractions/Panels/Debug/DebugPanel.cs
@@ -44,21 +44,30 @@ public sealed class DebugPanel : IPanel
     /// </summary>
     private static readonly (string Key, string Action)[] Keybinds =
     {
-        ("Esc",       "exit fly / player / close window"),
-        ("Tab",       "toggle player mode (when in-world)"),
-        ("F",         "toggle fly camera"),
-        ("F1",        "toggle this debug panel"),
-        ("F2",        "toggle collision wireframes"),
-        ("F3",        "console dump (pos + nearby objects)"),
-        ("F7",        "cycle time-of-day override"),
-        ("F8 / F9",   "mouse sensitivity slower / faster"),
-        ("F10",       "cycle weather"),
-        ("W A S D",   "move (player mode) / fly"),
-        ("Mouse",     "turn character / look (fly)"),
-        ("Hold RMB",  "free orbit camera around player"),
-        ("Wheel",     "zoom chase camera in / out"),
-        ("Space",     "jump"),
-        ("Shift",     "run"),
+        // K-fix4 (2026-04-26): refreshed for the retail-default keymap +
+        // Phase K input-pipeline bindings. F1-F12 alone are retail panel
+        // toggles; acdream debug actions live behind Ctrl+F* to avoid
+        // retail conflicts.
+        ("Esc",          "exit fly / close window"),
+        ("F11",          "open Settings (key rebinding etc.)"),
+        ("Ctrl+Shift+F", "toggle free-fly camera"),
+        ("Ctrl+F1",      "toggle this debug panel"),
+        ("Ctrl+F2",      "toggle collision wireframes"),
+        ("Ctrl+F3",      "console dump (pos + nearby objects)"),
+        ("Ctrl+F7",      "cycle time-of-day override"),
+        ("Ctrl+F8 / F9", "mouse sensitivity slower / faster"),
+        ("Ctrl+F10",     "cycle weather"),
+        ("W / X",        "run forward / backward"),
+        ("A / D",        "turn left / right"),
+        ("Z / C",        "strafe left / right"),
+        ("Q",            "autorun toggle"),
+        ("Shift",        "walk modifier (default = run)"),
+        ("Space",        "jump (hold to charge)"),
+        ("Y G H B",      "stand / sit / crouch / lie"),
+        ("Hold MMB",     "instant mouse-look"),
+        ("Hold RMB",     "free orbit camera around player"),
+        ("Wheel",        "zoom chase camera in / out"),
+        ("Tab",          "focus chat input"),
     };
 
     /// <inheritdoc />