As promised, how warpage works

[Rickabilly]

I just decided to post this without having put much thought in, just as a kneejerk to the response I posted, regarding warpage of Angle iron and Rectangular Tube Mitre joints. I couldn't even guess where my old weld testing and shrinkage papers and Texts are, it's been almost twenty years since I studied this stuff, I use it regularly but I doubt that even an image or two would be enough I think it needs to be an animation, maybe a series of JPEGs in a slideshow,
I am thinking about it but I haven't posted any pictures here on MWF yet I tried once without success.

Best regards
Rick

PS, I just tried another random picture, I dont think it worked