There was a topic about this once, not that I could find it again. I do remember that outside was the best place, for the light.
I have had some luck with using spring type pants hangars to grip the top edge, then hanging those on the top rim of a tall bookcase we have -- of course that's inside. I suppose I could use the tall fence at the edge of the deck as well.
But remember that all of us here just want to see the pics with good light and good colors -- slanting or twisting doesn't matter -- we are not the quilt police!