Hytale Cubic Chunks Explained: Infinite World Height and Depth

If you have followed the weekly Update 6 pre-releases, you have probably seen a phrase turning up again and again in the patch notes: cubic chunks. It sounds like deep engine jargon, and under the hood it is — but the payoff is one of the most exciting structural changes Hytale has ever attempted. In plain English, Hytale cubic chunks are what unlock effectively infinite world height and depth: sky-high builds, bottomless caves, and worlds that are no longer boxed in by a fixed vertical ceiling. This explainer breaks down what cubic chunks actually are, how they work, and why they matter for players, modders, and server owners. Quick note: cubic chunks are being rolled out incrementally across the Update 6 weekly pre-releases. Some of the changes below are already live in testing, while official content built around infinite height is planned for later. Treat this as a look at an in-progress engine transition, not a finished feature. What Are Hytale Cubic Chunks? To understand cubic chunks, it helps to know how most voxel games load their worlds. Games like Minecraft — and Hytale, until recently — use column-based chunk loading. The world is sliced into vertical columns: for every horizontal position on the map, the game loads one tall column that stretches from the very bottom of the world all the way to the sky, in one piece. That column is your unit of loading. It works great horizontally, but it hard-caps how tall or deep a world can be, because the whole floor-to-sky column has to be handled at once. Cubic chunks change the shape of that unit. Instead of one tall column per horizontal spot, Hytale divides the world into stacked cube-shaped sections — think of the world as a 3D grid of blocks-of-chunks rather than a field of tall pillars. Crucially, those cube sections are loaded on demand vertically as well as horizontally. The game only streams in the cubes near you, whether they are beside you, far above you, or deep below. How Cubic Chunks Unlock "Infinite" World Height and Depth Here is the simplest analogy. Minecraft streams chunks horizontally as you walk around — that is why you can wander in any direction essentially forever without hitting a wall. Hytale's cubic chunks apply that exact same idea to the vertical axis. As you climb or dig, the engine streams cube sections up and down just like it streams them sideways. Because the world is no longer one fixed-height column, there is no fixed ceiling or floor built into the format. This is why you will hear the phrase "infinite" world height and depth. It does not mean there is a specific giant number for the height limit — it means the concept of a single fixed column height goes away entirely. Build height and cave depth stop being a hard-coded cap and become a matter of how far you want to go. The practical benefits are significant: Lower memory use and better performance at extreme heights. The engine only holds the cube sections you are actually near, instead of keeping a full floor-to-sky column resident. Endless deep caves and mining. Cave systems and mineshafts can extend far below the old floor without special-casing. Very tall vertical builds. Sky bases, towering megastructures, and layered vertical minigames become viable without fighting an artificial ceiling. The Engine Work Behind the Scenes: Slikey and RocksDB A change this deep does not happen overnight, and it is not without risk. This work is led by Hytale Technical Director Slikey (Kevin Carstens), whose overview video, "Infinite World Height," walks through the goal in detail. Supporting the transition, the team added RocksDB to the codebase — a high-performance embedded key-value store well suited to reading and writing lots of small, independent chunks of data on demand, which is exactly what per-section vertical streaming demands. Just as important is how the migration is being done. Rewiring the fundamental way a game stores and loads its world is the kind of change that can corrupt existing saves if handled carelessly. The team is being deliberate and iterative about it — shipping the transition piece by piece across pre-releases specifically so that existing worlds are not corrupted along the way. That is why cubic-chunk work shows up as a steady trickle of fixes in the weekly notes rather than one dramatic switch being flipped. What Has Already Shipped in Update 6 Pre-Releases Cubic chunks are not purely theoretical — concrete changes are already in players' hands through the Update 6 pre-release patch notes. A few highlights that came directly out of the cubic-chunk transition: The Paste Tool now pastes at every height level. Builders using copy-and-paste workflows are no longer constrained to a limited vertical band. Fixes so doors, stairs, and roofs function correctly in cubic worlds. These are exactly the kind of block behaviors that had to be re-validated once the loading model changed. Fluid-update performance fixes. Water and other fluids behave better and cost less to simulate under the new section-based world. If you want the granular, ship-by-ship detail, our Update 6 Part 6 patch notes recap covers the specific drop where several of these landed, and our pre-release testing guide shows how to opt in and try them yourself. What Cubic Chunks Mean for Server Owners and Modders This is where things get especially interesting if you run or build for a Hytale server. The move to cubic chunks brings new plugin and developer hooks so that mods can react to sections loading and unloading, and so that worlds can be saved per-section rather than per-column. The Update 6 Part 6 patch notes introduce: ChunkSectionPreLoadProcessEvent — fires as a cube section is about to be loaded and processed, giving plugins a hook into the streaming pipeline. SectionUnloadEvent — fires when a section unloads, so mods can clean up or persist state tied to that part of the world. IChunkSaver.Cubic — an interface for per-section world saving, reflecting the shift from saving tall columns to saving individual cubes. For server owners, the headline is opportunity. Effectively unlimited vertical space means whole new categories of content: multi-layer sky wars arenas, dungeon complexes that plunge for hundreds of blocks, vertical parkour towers, and mining servers where the deep is genuinely deep. Because sections load on demand, these can exist without forcing every player's client to hold the entire vertical stack in memory. If you build modes that lean into height and depth, cubic chunks are the foundation you have been waiting for — and worth planning around now, before the stable release. How Cubic Chunks Fit the Bigger Roadmap Cubic chunks are not a standalone experiment; they are one pillar of the broader engine overhaul Game Director Simon laid out in the July 16 Chapter 1 First Look. That same roadmap pairs cubic chunks with WorldGen V2, the new graph-based procedural generation system — and the two are natural partners. Infinite vertical space is far more meaningful when the generator can actually fill it with sprawling cave systems and layered terrain. Our WorldGen V2 graph and nodes guide digs into how that generation pipeline works. Timing-wise, all of this is converging. The cubic-chunk rollout continues across the weekly pre-releases, and Update 6 stable is expected within weeks. Third-party coverage, including MassivelyOP's July 18 report, echoes the same picture: world-tech foundations first, official content built on top of them later. For the latest on when the stable build lands, keep an eye on our Update 6 release date tracker. The Bottom Line Hytale cubic chunks are a quiet revolution disguised as a technical footnote. By swapping tall floor-to-sky columns for stacked 3D cube sections streamed on demand in every direction, Hytale is trading a fixed vertical ceiling for something that behaves like infinite world height and depth — with better performance and lower memory use as a bonus. It is being rolled out carefully so your worlds stay safe, it is already improving builder tools and fluid performance today, and it hands modders and server owners powerful new hooks to build with. If cubic chunks have you dreaming up sky cities, bottomless dungeons, or a vertical minigame no one has tried yet, there has never been a better time to get your community discovered. List your Hytale server on HytaleCharts to collect votes, climb the rankings, and reach players before Update 6 goes stable. We will keep this coverage updated as the cubic-chunk transition continues. Sources: Update 6 pre-release patch notes, "First Look: Chapter 1 and More" (July 16, 2026), and Technical Director Slikey's "Infinite World Height" video. Details reflect an in-progress engine transition and are subject to change.