rememberMaterial

Asynchronously loads a Filament Material and keeps it alive as long as the calling composable is in the composition. Returns null while loading and on failure — it never throws inside composition. Pass onError to react when load throws (missing file, network error).

Can be called either inside rememberFilamentScene { } (engine is picked up from LocalFilamentEngine) or outside it by hoisting the engine via rememberFilamentEngine:

// Inside rememberFilamentScene — engine implicit
rememberMaterial { Res.readBytes("…") }

// Outside a scene — engine hoisted, can be shared across scenes
val engine = rememberFilamentEngine()
val mat    = rememberMaterial(engine) { Res.readBytes("…") }
val scene  = rememberFilamentScene(engine = engine) { ... }

Parameters