Improve comment for Renderer::SetDynamicInstancing().

Source/Urho3D/Graphics/Renderer.h

@@ -218,7 +218,7 @@ public:
     void SetReuseShadowMaps(bool enable);
     /// Set maximum number of shadow maps created for one resolution. Only has effect if reuse of shadow maps is disabled.
     void SetMaxShadowMaps(int shadowMaps);
-    /// Set dynamic instancing on/off.
+    /// Set dynamic instancing on/off. When on (default), drawables using the same static-type geometry and material will be automatically combined to an instanced draw call.
     void SetDynamicInstancing(bool enable);
     /// Set minimum number of instances required in a batch group to render as instanced.
     void SetMinInstances(int instances);