Moroccan style henna is distinct in the element that it uses for its creation. Moroccan style henna involves a lot of straight lines and geometric elements like triangles and squares. No crazy polyhedrons though.
Most Moroccan patterns have areas of very dense patterning contrasted with an open space or geometric border. Unlike Indian or Arabic design it is not uncommon for the line with to be pretty uniform. Moroccan designed are also more bang for your buck when their spacing is tighter between elements.
Many Moroccan designs are set of parallel lines with a thin zig zag in between them. This type of design element gives the balance of an open space while still being dense enough to make it seem like there's a contrast in the design elements. Unlike Arabic or Indian style designs, Moroccan designs don't usually have that much line variation. Of course all of this changes when you try to do Fusion style henna designs.
The most important thing about Moroccan designs, that I learned, was to have elements that are closer together, controlling the line thickness, incorporating zigzags in between sets of parallel lines. Many dramatic Moroccan design incorporate larger triangles which are broken into smaller triangles and squares.
To learn more about Moroccan style henna, I highly recommend the following: https://www.blurb.com/b/1417499-moor-a-henna-atlas-of-morocco
original design by @HennaArtCanada on an albino leaf
Another Moor style henna application on natural leaf. Original design @HennaArtCanada
A minimalist Moor design application on acrylic practice hand template. Get your template here: https://www.hennaart.ca/acrylichandtemplate
A 2014 practice application of Moroccan style henna
This one was a client request from an original Darcy of Henna Lounge design. @HennaLounge