Issue with 3D Perlin implementation

There seems to be an issue with the Perlin 3D implementation. Passing the following data `world_position.xyz * 5.0` - Simplex 3D:  - Perlin 3D:  It seems to have something to do with the algorithm only using the decimal part on one of the parameters, the cube has length of 1, notice how I multiplied the input by 5 and we see 5 stripes in one of the directions...