protected virtual void InitRenderQueue()
{
this.renderQueue = new RenderQueue();
// init render queues that do not need shadows
this.renderQueue.GetQueueGroup( RenderQueueGroupID.Background ).ShadowsEnabled = false;
this.renderQueue.GetQueueGroup( RenderQueueGroupID.Overlay ).ShadowsEnabled = false;
this.renderQueue.GetQueueGroup( RenderQueueGroupID.SkiesEarly ).ShadowsEnabled = false;
this.renderQueue.GetQueueGroup( RenderQueueGroupID.SkiesLate ).ShadowsEnabled = false;
}