diff --git a/4J.Render/4J_Render.cpp b/4J.Render/4J_Render.cpp
index 879a27695..65b408e1e 100644
--- a/4J.Render/4J_Render.cpp
+++ b/4J.Render/4J_Render.cpp
@@ -176,6 +176,18 @@ bool C4JRender::ShouldClose()
     return !s_window || glfwWindowShouldClose(s_window);
 }
 
+void C4JRender::Shutdown()
+{
+    // Destroy the main window and terminate GLFW cleanly so that
+    // destructors running after the game loop don't touch a dead context.
+    if (s_window)
+    {
+        glfwDestroyWindow(s_window);
+        s_window = nullptr;
+    }
+    glfwTerminate();
+}
+
 void C4JRender::DoScreenGrabOnNextPresent() {}
 
 void C4JRender::Clear(int flags)
diff --git a/4J.Render/4J_Render.h b/4J.Render/4J_Render.h
index 657edaf99..d16df4112 100644
--- a/4J.Render/4J_Render.h
+++ b/4J.Render/4J_Render.h
@@ -210,6 +210,7 @@ public:
 
 	// Linux window management
 	bool ShouldClose();
+	void Shutdown();
 };
 
 
diff --git a/Minecraft.Client/Platform/Linux/Linux_Minecraft.cpp b/Minecraft.Client/Platform/Linux/Linux_Minecraft.cpp
index 748b0da8d..8fdb60aca 100644
--- a/Minecraft.Client/Platform/Linux/Linux_Minecraft.cpp
+++ b/Minecraft.Client/Platform/Linux/Linux_Minecraft.cpp
@@ -955,7 +955,12 @@ else
 // A memory leak was caused because the icon renderer kept creating new Vec3's because the pool wasn't reset
 Vec3::resetPool();
 } // end game loop
-}
+
+	// Graceful shutdown: destroy GL context and GLFW before any C++ dtors run.
+	// Without this, static/global destructors that touch GL objects cause SIGSEGV.
+	RenderManager.Shutdown();
+	_exit(0);
+} // end main
 
 // Free resources, unregister custom classes, and exit.
 //	app.Uninit();
diff --git a/Minecraft.Client/Rendering/Tesselator.cpp b/Minecraft.Client/Rendering/Tesselator.cpp
index 921175e2a..d16746a23 100644
--- a/Minecraft.Client/Rendering/Tesselator.cpp
+++ b/Minecraft.Client/Rendering/Tesselator.cpp
@@ -109,11 +109,13 @@ void Tesselator::end()
         if (!hasColor)
 		{
 			// 4J - TEMP put in fixed vertex colors if we don't have any, until we have a shader that can cope without them
+			// Use 0x00000000 (not 0xffffffff) so DrawVertices skips glColor for these vertices,
+			// letting any caller-set GL colour (e.g. sky colour) pass through unmodified.
 			unsigned int *pColData = (unsigned int *)_array->data;
 			pColData += 5;
 			for( int i = 0; i < vertices; i++ )
 			{
-				*pColData = 0xffffffff;
+				*pColData = 0x00000000;
 				pColData += 8;
 			}
 #ifdef __PSVITA__