Apply a "noise map" in the "Filter Color" slot and set it like on img.
2
这个视频深入讲解如何使用噪波、倾斜度、图片以及程序纹理去创建更高级的基于贴图的节点。
The video goes much deeper buy showing you how to create more advanced node based textures using noise, gradients, as well as images and procedural textures.