Is it possible to perform layer operations in separate threads without using the main execution thread?

In iOS, operations with CALayer, such as changing layer properties (e.g., position, opacity, transform), must be performed on the main thread, as UIKit and Core Animation are not thread-safe. However, heavy computations or data preparation for the layer (e.g., generating images, calculating paths) can be done in a background thread, and layer updates can be applied on the main thread.

Example:

DispatchQueue.global().async {
    // Heavy computations
    let image = generateImage()
    DispatchQueue.main.async {
        layer.contents = image.cgImage
    }
}

Thus, layer operations should not be performed directly in separate threads, but data preparation is allowed.