bool VRendererNodeCommon::RendersIntoBackBuffer()
{
  int iNumContexts = GetContextCount();
  for (int i=0; i<iNumContexts; i++)
  {
    VisRenderContext_cl *pContext = GetContext(i);
    if (pContext != NULL)
      if (pContext->RendersIntoBackBuffer())
        return true;
  }

  return false;
}