This tutorial teaches how to smooth skin texture in Photoshop. First, duplicate the background layer and apply a Gaussian blur with a radius of 0.5-2 pixels. Then, change the blending mode of the blurred layer to "Lighten". This will lighten dark spots and smooth skin texture while keeping highlights intact. The tutorial recommends adjusting the opacity of the blurred layer to achieve a natural looking result.

1. http://photoshopdi.blogspot.com/2013/07/menghaluskan-wajah-photoshop-1.html