# init(input:configuration:) Creates a session from a sequence of samples. ``` convenience init(input: S, configuration: PhotogrammetrySession.Configuration = Configuration()) throws where S : Sequence, S.Element == PhotogrammetrySample ``` ## Parameters `input` the input `Sequence` that will be iterated once to yield all input data. `configuration` the session-wide configuration to use for this session. ## Discussion Creates a new session instance from a custom sequence of [`PhotogrammetrySample`](/documentation/RealityKit/PhotogrammetrySample) objects by iterating over the provided object. The constructor will only use `makeIterator()` on `input` and will then iterate through the sequence only once. A provided iterator should be lazy, or a lazy and map used. > Note: To minimize memory usage, use lazy sequences that only create a ``doc://com.apple.RealityKit/documentation/RealityKit/PhotogrammetrySample`` as it iterates by making calls to `next()` on its associated > . --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)