project-entity/Assets/_Project/Develop/Runtime/Utilities/Layers.cs

using UnityEngine;

namespace _Project.Develop.Runtime.Utilities
{
    public static class Layers
    {
        public static readonly int Characters = LayerMask.NameToLayer("Characters");
        public static readonly LayerMask CharactersMask = 1 << Characters;
        
        public static readonly int Environment = LayerMask.NameToLayer("Environment");
        public static readonly LayerMask EnvironmentMask = 1 << Environment;
    }
}