Then I added the white line on the ground. I download a road texture from www.cgtextures.com, and opened it in Photoshop (Fig.19).


I used a tool to clean the road part, leaving me with Fig.20.


Then I got the final texture by adding a black layer (Fig.21).


Using this texture as the third layer of the composite texture, I set the map channel to 3 and disabled the V-tiling. Then I added a color correction node to adjust the white line, which made the line darker. I set the blending mode to Screen and the opacity to 80 (Fig.22 – 23).


Once the diffuse map was finished, I went on to adjust the UV of the ground object. The ground object was a simple plane. As the composite of diffuse map, I needed three UVW map modifiers to control the scale of the textures.

The first UVW map was easy to set; I just had to make sure that the texture was clean. The Bitmap Fit button made things better (Fig.24).