`rand2dTo1d` should be `rand1dTo1d` https://github.com/ronja-tutorials/ShaderTutorials/blob/31899f7b7de1158be45c968c1ac039c04b849bbb/Assets/029_Tiling_Noise/Random.cginc#L55-L56 (Maybe this is also the case in the `Random.cginc`s in other folder.) Loved the tutorial however!