riversong-code-showcase/Source/Riversong/Game/WorldGen/Operations/TerrainMaterialsInitializationOperation.cs

using Cysharp.Threading.Tasks;
using UnityEngine;

namespace DanieleMarotta.RiversongCodeShowcase
{
    public class TerrainMaterialsInitializationOperation : IWorldGeneratorOperation
    {
        private static readonly int TerrainMapPropertyID = Shader.PropertyToID("_Terrain_Map");

        [InjectService]
        private GameConfig _config;

        public UniTask Execute(World world)
        {
            var map = (Texture2D)_config.WorldGen.MapTextures[0].Asset;
            Shader.SetGlobalTexture(TerrainMapPropertyID, map);

            return UniTask.CompletedTask;
        }
    }
}