Hi. Component visualizer works a bit different. It diplays only selected components as I know. If you want to draw something persistant to display your components you have to use a component render proxy (it responsible both for debug and realtime drawing. ) To find out how to do this you can see a Spline component code already existing in the engine. Actually you have to override CreateSceneProxy() function to create and return your own scene proxy that will draw anything you need.