This time I have tried to improve my material skills, using the node editor. To further improve my skills in the node editor, I have consulted a blender conference video " Materials Made Easy - Non-Destructive Shading in Blender" , that you can check here. It belongs to the Official Blender Youtube Channel . To quickly model rocks , a similar workflow of the one shown in the video above was used. Start with a simple extruded cube. Then, add a subdivision surface to make it smooth. Add a displace modifier with a Voronoi texture with large displacement scale, to give the base rock mesh. Then, add a second subdivision surface modifier, to smooth out those weird edges from the displace modifier. At last, add a displace modifier with a second Voronoi texture, with smaller details. This gives the rock a more realistic look, without having to actually model a realistic one. On the modifiers tab you should end with somethin