public void RemoveEntity(EnityDesc desc)
 {
     if (desc.drawMethod == DrawMethod.FAST_VS)
     {
         FastRenderEntities.Remove(desc);
     }
     else
     {
         StableRenderEntities.Remove(desc);
     }
 }
 public void AddEntity(EnityDesc desc)
 {
     if (desc != null)
     {
         if (desc.drawMethod == DrawMethod.FAST_VS)
         {
             FastRenderEntities.Add(desc);
         }
         else
         {
             StableRenderEntities.Add(desc);
         }
     }
 }