BUILDING BIG: WHAT EVERY DEVELOPER SHOULD KNOW ABOUT WORLD PARTITION IN UNREAL ENGINE
By Adam Capon, Senior Technical Artist at Tanglewood Games B
uilding large and exciting worlds is a core challenge for game developers. There’s huge player demand for worlds both large
in size, but also densely populated. The bigger the world, the more content you need, and the more content you have, the harder it becomes to keep everything running smoothly. For years, the standard approach was to break
worlds into discrete levels and stream them in and out as the player moved. It worked, but it was manual and didn’t scale well at all. As player expectations grew and open
worlds became a genre expectation rather than a technical showpiece, we needed a better solution. That drove a wave of new systems across engines, and in Unreal Engine, the answer was World Partition.
WHAT WORLD PARTITION ACTUALLY DOES World Partition is Unreal Engine’s system for managing large-scale worlds. Rather than making developers manually divide a world into levels and manage the transitions between them, World Partition handles everything automatically. It divides the world into a grid, loads what the player needs based on a loading range, and unloads what they don’t, all in the background, without manual intervention out of the box. It also manages how the world looks at distance, using a system called HLODs
38 | MCV/DEVELOP July/August 2026
(Hierarchical Level of Detail) to ensure that areas outside the player’s immediate vicinity still look credible rather than simply disappearing. The result is that teams can build larger,
more continuous worlds without the overhead of managing that complexity by hand. For open-world games, racing games, and large- scale adventures, it has become close to essential.
IT HASN’T ALWAYS BEEN THIS GOOD World Partition was introduced in Unreal Engine 5 as a successor to UE4’s World Composition, Epic’s first attempt at automated, distance-based level streaming. World Partition rebuilt that approach around actor-level streaming, and future engine iterations have continued to build on it. Early adopters encountered real limitations
that required significant workarounds but thankfully many of those issues have been addressed. Understanding that history matters, because teams working with legacy World Partition setups may still be carrying the assumptions and workarounds of earlier versions, even if the engine has moved on. Unreal Engine 5.6 and 5.7 have brought
significant improvements to streaming stability, HLOD capabilities, and FastGeo, while giving developers considerably more control over the system’s behaviour where it’s needed most. On
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56
