Here is a concept of an Ortan Guard wearing light armor for my personal "Grey Days" rpg project.
The Ortans are a race of tall humanoids (average of 7.5 feet tall) that have enslaved the human race two centuries ago.
They have developed a better use of gunpowder and come from a tribal background that worshipped the use of blood, but have been progressing technologically throughout their story.
I did quite a lot of research to make this race and design, going through Aztec, Maya and Peruvian civilizations, as well as Egyptians.
Here you can also see my evolution throughout the years.