Blending sand and dirt

Blending - Sand and Dirt

Blending stone and dirt

Blending - Stone and Dirt

"Blending" appears when placing two materials on or near each other creating a graphical effect. The effect will stay after you remove the material you put on or near it.

Blended material seems to consist partially of a vacuum where no material is present, but the graphics are rendered to give the illusion there's more. You can see this if you start building in mid-air and connect to the ground. It will fill in the blanks with blended material, but mining that won't give anything. Even if it appears that there's another mineral blended into the terrain (for example, black ore in stone), if the amount is too small, you will gain nothing from mining it.