Links of interest

https://www.pinterest.ca/jakemcnally48/decorative-shingles/
https://www.mikeguertin.com
https://www.facebook.com/JollyRogerWoodworking
http://cedarexpressions.com
http://www.shingledesigns.com – (Viewed best on a computer)
http://www.fancyshingles.com
https://chrisreganbuilder.com

Decorative Shingle Suppliers:

https://tealjones.com/our-products/classic-butts/
https://waska.com/en/our-products/white-cedar-shingles/victorian-series
https://maibec.com/en/genuine-wood-shingles/
https://www.vintagewoodworks.com/cutcedcart.html
http://www.shakertown.com/cedar-products/fancy-cuts-shingle/
http://www.watkinsawmills.com/sidewall-shingles/heritage-cut-designer-shingles
https://mosaicshingles.com
https://sbccedar.com/products/shingle-siding/designer-shape-white-cedar/

Additional Info:
http://www.finehomebuilding.com/1989/07/01/decorative-sidewall-shingles
http://www.finehomebuilding.com/1999/03/01/weaving-patterns-in-sidewall-shingles
http://www.oldhouseonline.com/gardens-and-exteriors/decorative-shingling-ideas/
http://www.oldhouseonline.com/gardens-and-exteriors/shingle-patterns-for-queen-anne-houses/
http://www.fau.uchile.cl/noticias/150800/exposicion-que-pone-en-valor-las-tejuelas-chilotas-arriba-a-la-fau
http://www.cedarbureau.org/product-types/certi-cut-shingles/