2 Create an architectural style
To develop an architectural style, I start out with small sketches of archways, doorways and pillars, pulling from real-world influences. I build up shape language and methods of construction that support the time period and setting. Even if most players never read the history of Summoner’s Rift, their subconscious will relate to our world from their experience. This is a great opportunity to imply religious or faction alignments with deity statues integrated into the architecture, or simply a cultural fascination with star charts, for instance. Every pillar, brazier and brick is an opportunity to imply greater depth to the history of your world.
More rounded shapes tend to be more welcoming, while pointed shapes create a sense of danger