On iPhone 17 Pro with iOS 26.3.1, ParticleEmitterComponent impact VFX appear visually rooted near the device / the world pose from when tracking stabilized, not at the intended world-space hit, even though the host entity hierarchy is correct: we parent clones under ground_anchor with convert(position:from: nil) from world hits, and runtime logs show holderOriginWorld matches requestedWorldPos with worldPosErrM = 0, so this is not an app-side anchor math bug. particlesInheritTransform = true (Apple’s suggested workaround) does not fix the visible misplacement. This matches the ParticleEmitterComponent / transform regression discussed around iOS 26.1+ (e.g. forum thread / FB21346746). We’re looking for confirmation, workarounds, or a fix timeline from Apple Engineering.
Topic:
Graphics & Games
SubTopic:
RealityKit
Tags: