Instance Property

diffuse

An object that manages the material’s diffuse response to lighting.

Declaration

@property(nonatomic, readonly) SCNMaterialProperty *diffuse;

Discussion

Diffuse shading describes the amount and color of light reflected equally in all directions from each point on the material’s surface. The diffuse color of a pixel is independent of the point of view, so it can be thought of as a material’s “base” color or texture.

By default, the diffuse property’s contents object is a white color. The figure below shows the effect of setting the diffuse property’s contents to a texture image on a material whose other properties have default contents.

Figure 1

Adding a diffuse texture to a material

The material’s lightingModelName property determines the formula SceneKit uses to combine its diffuse color and other visual properties with lights and other contents in a scene to produce the final color for each rendered pixel in the rendered scene. For details, see Lighting Models.

See Also

Visual Properties for Physically Based Shading

metalness

An object that provides color values to determine how metallic the material’s surface appears.

roughness

An object that provides color values to determine the apparent smoothness of the surface.