diff --git a/src/AcDream.App/Rendering/GameWindow.cs b/src/AcDream.App/Rendering/GameWindow.cs
index 1048e02..6ba12a7 100644
--- a/src/AcDream.App/Rendering/GameWindow.cs
+++ b/src/AcDream.App/Rendering/GameWindow.cs
@@ -33,6 +33,10 @@ public sealed class GameWindow : IDisposable
     private AcDream.App.Rendering.Wb.WbMeshAdapter? _wbMeshAdapter;
     private AcDream.App.Rendering.Wb.EntitySpawnAdapter? _wbEntitySpawnAdapter;
     private AcDream.App.Rendering.Wb.WbDrawDispatcher? _wbDrawDispatcher;
+    /// <summary>Phase N.5: ARB_bindless_texture + ARB_shader_draw_parameters
+    /// support. Non-null only when both extensions are present and WbFoundation
+    /// is enabled. Passed to TextureCache and (later) WbDrawDispatcher.</summary>
+    private AcDream.App.Rendering.Wb.BindlessSupport? _bindlessSupport;
     private SamplerCache? _samplerCache;
     private DebugLineRenderer? _debugLines;
     // K-fix4 (2026-04-26): default OFF. The orange BSP / green cylinder
@@ -1419,7 +1423,26 @@ public sealed class GameWindow : IDisposable
         _heightTable = heightTable;
         _surfaceCache = new Dictionary<uint, AcDream.Core.Terrain.SurfaceInfo>();
 
-        _textureCache = new TextureCache(_gl, _dats);
+        // N.5: detect ARB_bindless_texture + ARB_shader_draw_parameters when WB
+        // foundation is on. Store the BindlessSupport for TextureCache + future
+        // WbDrawDispatcher. Mesh shader load stays as mesh_instanced for now —
+        // Task 10 swaps to mesh_modern after the dispatcher is rewired.
+        if (AcDream.App.Rendering.Wb.WbFoundationFlag.IsEnabled
+            && AcDream.App.Rendering.Wb.BindlessSupport.TryCreate(_gl, out var bindless)
+            && bindless is not null)
+        {
+            if (bindless.HasShaderDrawParameters(_gl))
+            {
+                _bindlessSupport = bindless;
+                Console.WriteLine("[N.5] modern path capabilities present (bindless + ARB_shader_draw_parameters)");
+            }
+            else
+            {
+                Console.WriteLine("[N.5] GL_ARB_shader_draw_parameters not present — modern dispatch path will not activate");
+            }
+        }
+
+        _textureCache = new TextureCache(_gl, _dats, _bindlessSupport);
         // Two persistent GL sampler objects (Repeat + ClampToEdge) so
         // the sky pass can pick wrap mode per submesh without mutating
         // shared per-texture wrap state. See SamplerCache + the