Tip: Layer 3 backgrounds and tides disappear when you hit a message box, so plan your level around that. For example, you can add a sublevel without layer 3 at the start/midpoint, and include your message there.
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Don't mind the long wait for files in the queue, as currently the BRR section is undergoing a guideline revamp. Stay tuned for more info!
You can preview each BRR in the section by downloading them and using BRR Player to listen to them.