Reduce render distances for better performance

- Terrain load radius: 2 tiles (was 6) - 25 tiles max vs 169
- WMO render distance: 500 units (was 3000)
- M2 doodad distance: 300 units (was 1000)

src/rendering/m2_renderer.cpp

@@ -364,7 +364,7 @@ void M2Renderer::render(const Camera& camera, const glm::mat4& view, const glm::
     lastDrawCallCount = 0;
 
     // Distance-based culling threshold for M2 models
-    const float maxRenderDistance = 1000.0f;  // Don't render small doodads beyond this
+    const float maxRenderDistance = 300.0f;  // Reduced for performance
     const float maxRenderDistanceSq = maxRenderDistance * maxRenderDistance;
     const glm::vec3 camPos = camera.getPosition();