It has occurred to me that perhaps I ought to show how I modify flag downloads from the standard square or rectangle into something more like a rhombus or parallelogram. I have found that rhomboidal paper flags 'drape' in much more realistic fashion once you fasten them to their wire pole.
Paul of 'Paul's Bods' having mentioned the Grimsby Wargames Society's free download, I availed myself of their resource. Here is the first page of the House of Lancaster as it appears on site and when downloaded. Nicely coloured and shaded. Now, normally I don't bother with shading flags, figuring that they are self shading. But that depends upon how much trouble you take to obtain a realistic looking 'hang.' But since the shading is there, I'll take it. With thanks.