This is my first attempt at making a background to use for my Asura Loras! It... isn't perfect! However, I have gotten some cool results~ Look at the meta data for my posted images for the weights/sampler and so on that I use.
With no characters on top of the background, I keep the weight high - however, I found that trying to add a character resulted in... eeeehhh... mistakes. I recommend turning the weight down low, like 0.1-0.25 if you want characters in there. The downside is the lower you go, the more generic the background becomes - obviously, since that's how weights work lol.
Prompt: Basic prompts should start with: "Rata_Sum, GW2_style, background, 3d, video game" if you want a more 3d game-like result.
Unique tags used in training: asuran_architecture, asuran_tech, asuran_console, floating cubes, floating planter. Holograms tend to come out as circles - I focused on blue and purple holograms since they're the most common in Rata_Sum. If you want an outdoor shot, I recommend using "sky" and "grass." "Trees" and "Flowers" and "Vines" are optional.