What's New in Rust's "Devblog 128" Update

Devblog 128 arrived on September 22nd, 2016, and it's one of those patches that mattered more for what it announced than what it shipped. Helk published the full outline of the locational component system - the progression model that would eventually kill XP for good - while the natural caves took a big visual leap, grass displacement made its comeback, and two building-system changes split Reddit right down the middle.

The Component System, Outlined

Helk declared himself ready to begin development on replacing the XP system with a locational component system. The core idea: loot-only components - things like Metal Pipes, Rope, Gears, Glue, Duct Tape, Disinfectant, Tech Parts, Batteries, Tarp, Nails, and Screws - would be required in most crafting recipes and shared between them.

The supporting changes were sweeping:

• Everything craftable by default
• New players spawn only in the south of the map
• Radiation fields grow stronger the farther north you go, slowing movement when unprotected; clothing protects against it, and a radsuit is required for very high levels
• Higher-tech loot-only components spawn further north
• All resource gathering rebalanced to be more in line with Legacy

The design goal was to split the player base into a gradient by tech tier: fresh spawns on the southern beaches should rarely meet geared AK players, because those players would have no reason to be there. Radiation would stop zergs from sprinting straight to the top of the map - you'd have to establish yourself and climb the rungs. Helk was upfront about a known problem: getting raided or killed would sting more with no XP or blueprint progress to fall back on, a "pure psychological/perception issue" they might still need to address. The whole plan would be proven out on prerelease first - and it came with the world's most honest asterisk: "subject to change, maybe it'll all suck."

Natural Caves Take Shape

The caves had a packed week. A new ambient light volume system meant daytime lighting no longer bled into underground and fully enclosed interiors - caves could now be pitch black at any hour where the artists wanted. Diogo built a 4-way material blend shader that lets four different materials blend in a single pass, with masks driven by vertex colors, which Vince used to paint layers of rock, sand, and gravel onto the cave rooms. Biome tinting was enabled too, so the palette shifts subtly by location. Room-dressing tests rounded out the week, and on the audio side, cave ambience got its own toolkit - light dirt-falls, placeable water drips, big spooky rock-shifting sounds for cliff edges, and metallic tones reserved for man-made spaces like the military tunnels.

Grass Displacement Returns

Rust Legacy had it, early Experimental had it, then performance killed it: grass being pushed down as you walk. Andre came up with a new approach without the old performance penalty, and the first iteration shipped as an experimental graphics option (disabled by default). Players leave trails of pushed-down grass for 60 seconds, and walking over the same patch twice pushes it down further - with the honest caveat that it "may or may not fuck everything up."

Building Changes Reddit Loved (and Hated)

Two changes to the building system landed with opposite receptions. First, the building blocked notification - which gave away hidden base locations and cluttered gunfights - now only appears in building mode or while holding a hammer. "Reddit loves it." Second, building privilege is now also checked at the construction placement position, not just the player's own, killing the meta of standing outside someone's cupboard radius while building inside it. "Reddit hates it."

A nasty state-corruption bug also died: respawning in a sleeping bag placed on a slope could corrupt server-side player rotation, causing building privilege, line-of-sight, and object interaction bugs. Revives got more forgiving too - the line-of-sight check no longer cancels if the wounded player rolls around, as long as you keep looking in their general direction.

Performance and Rendering

Helk's profiling pass flagged regressions costing upwards of 5ms per frame, and the fixes followed. Riverless maps like Barren and Savas had an unusual water-system performance hit fixed, worth a slight frame rate boost. Terrain carving - the hacky system that cuts cave holes into Unity's terrain collider, built back when the world had about five caves - got a quick optimization to soften frame spikes when projectiles hit terrain, with a proper rewrite queued. A long-standing crash when switching servers was traced to terrain.basetexcomp and fixed, view models gained contact shadows when ambient occlusion is on, and the Terrain Quality setting stopped affecting shader detail - that's now solely controlled by Graphics/Shader Level for consistent quality across objects and terrain.

Hazmat, Lighthouse, and Music

Work began on the new Hazmat Suit, based on Paul's scientist NPC concept - a complicated piece still at blockout stage, but planned to function like regular wearable clothing once obtained. The Lighthouse was finished: proper collisions, LODs, loot spawning, and fully usable doors - but the volume of changes meant it had to wait for the next wipe to enter the game. And the music system gained tension layers built on top of the calm ambient pieces, kept in the same key so crossfades stay musical.

Between the component system blueprint, the cave tech, and the cupboard change, Devblog 128 set an unusual amount of Rust's future in motion for a patch with such a short changelist. The comment thread Helk asked for - to "iron out the obvious kinks before launch and avoid another XP system" - would prove worth having.