ImageMagick notes
1. Rotate a tiled image 45 degrees ⚓
Better results with square images, of course. The 45 is the degree amount.
convert in.png -matte -virtual-pixel tile +distort ScaleRotateTranslate '1 1 45' out.png
2. Stack images vertically ⚓
convert 1.jpg 2.jpg 3.jpg -gravity center -append out.jpg