Diffuse map provides a pattern of colors for a material.
You can select an image file as a texture map or a procedural map to assign a pattern or texture to a materialâ€™s diffuse color. The colors of the map replace, or partially replace, the materialâ€™s diffuse color component in the . This is the most common kind of mapping.
Mapping the diffuse color is like painting an image on the surface of the object. For example, if you want a wall to be made out of brick, you can choose an image file with a photograph of bricks, or you can use the procedural tiles map to simulate a brick pattern.