s&box 26.05.27 Patch Notes (27th May 2026)

A new update has been released, you can view the full changes on our blog post.

https://sbox.game/news/update-26-05-27

Changelog

🎁 Added

• Runtime mesh morphs API - `Mesh.AddMorph()` lets you add morph targets (position and normal deltas) to meshes at runtime
• Mesh to model dialog now shows options for configuring collision when converting meshes
• Mirror tool can now be repositioned after placing, similar to the clipping tool
• Bounding box snapping - bounding boxes now snap to grid by default
• `ResourceWriter.AddExternalReference` for referencing external resources (e.g. materials from model resources)
• Model inspector has useful info about meshes
• `DragEvent` constructor is now public, allowing custom input systems to forward drag events through the UI pipeline. Thanks @dictateurfou!
• Viewport background color is now customizable in editor preferences. Thanks @boxrocket6803!
• Cursor page rework in project settings - now shows all system cursors you can override and auto-adds cursor images on upload

🧼 Improved

• Audio system refactored with a lock-free triple-buffer threading model, eliminating previous crash-prone locking
• Steam Audio effects compiled directly into the engine with AVX SIMD, roughly doubling spatial audio performance and removing the external DLL dependency
• Physics queries no longer allocate heap memory for multi-result queries, using thread-local buffers instead
• Physics callback virtual dispatch overhead eliminated by using concrete types and caching body type lookups
• Rendering performance improved by removing redundant render attribute duplication, unnecessary performance trace scopes, and unused render pipeline stats
• LOD clutter screen coverage now calculated per-model instead of per-tile for more consistent results
• Media recording now captures at the end of the render pipeline, including overlays
• VMDL writer now also saves the PHYS block when exporting models
• Physics resource system modernized to use proper resource handling, enabling vphys resource previews
• Steamworks SDK and steamclient updated to latest version, which should reduce network packet issues
• Default video settings aligned between native and managed - MSAA now defaults to 4x (was 16x native), fullscreen defaults to borderless
• Grass rendering looking super dark in places
• Player display names now resolved locally, instead of by the host. Thanks @Matt9440!
• Compile timeout raised from 60 to 120 seconds for large projects. Thanks @MrBrax!
• Props now ignite their gibs when a burning prop breaks. Thanks @Xenthio!
• Scene wheel zoom now treated as camera movement. Thanks @TheGWOO!
• Dragged decal game objects now assigned proper names. Thanks @wheatleymf!

🪛 Fixed

• Fixed morph target names and categorization when importing models
• Fixed incorrect FBX morph normals
• Fixed managed video settings overwriting CLI flags like `-sw` and `-720` on startup
• Fixed shader "Internal Compiler Error" for inline shaders on Linux/Mac caused by wchar_t encoding differences
• Fixed Steam Audio not working correctly on Linux
• Fixed model scaling in mapping mode
• Fixed ESC not cancelling mesh tools
• Fixed ragdoll joint rest length using bind pose body positions instead of frame offsets
• Fixed scaled physics bones when world transform has scale
• Fixed objects wrongly becoming transparent after opaque fade fixes
• Fixed chat network messages not registering on non-host clients
• Fixed platform settings property getting cut off in the editor
• Fixed custom shaders having tinted wireframe
• Fixed mouse wheel direction for natural scrolling
• Fixed material override not clearing properly when applying model material groups. Thanks @Matt9440!
• Fixed Doo visual scripting not showing return assignment when function has no arguments. Thanks @PolEpie!
• Fixed viewport flashing on Linux/XWayland by suppressing Qt paint cycle. Thanks @AlexTrebs!
• Fixed pointlight shadows breaking when shadow resolution decreases. Thanks @boxrocket6803!
• Fixed missing hover styles when dragging items over folders in asset browser. Thanks @Matt9440!
• Re-enabled 'None' anti-aliasing option. Thanks @Mykol-Word!
• Editor now opens on the correct monitor. Thanks @boxrocket6803!
• Splash screen now always starts centered. Thanks @boxrocket6803!