Illumination and Shading Models

Ambient reflection is the component of light reflection that accounts for indirect, non-directional illumination in a 3D scene. It represents light that has been scattered and reflected multiple times throughout the environment, coming from all directions u...

Definition: Ambient light is the general, non-directional illumination present in a scene that comes from all directions uniformly. It represents indirect light that has been scattered and reflected multiple times throughout the environment. Characteristics...

Definition: Ambient light is the general, non-directional illumination present in a scene that comes from all directions uniformly. It represents light that has been scattered and reflected so many times in an environment that its original direction is no l...

Gouraud shading is an interpolation-based shading technique that computes color values at polygon vertices and then linearly interpolates these colors across the surface of each polygon during rasterization. It provides a smooth appearance by avoiding the f...

Phong shading is an interpolation-based shading technique that calculates surface color at each pixel by interpolating normal vectors across the polygon surface and applying the Phong illumination model at each point. - Compute the surface normal at each ve...

Aspect Gouraud Shading Phong Shading ---------------------------------------- Normal Calculation Normals computed at vertices only Normals computed at each pixel/fragment Intensity Calculation Intensity calculated at vertices, then interpolated across polyg...

Aspect Ambient Light Diffuse Reflection --------- Definition Constant background illumination that uniformly lights all surfaces regardless of position or orientation Light reflected equally in all directions from a surface based on the angle of incoming li...

Intensity attenuation refers to the reduction or weakening of light intensity as it travels through a medium or interacts with surfaces. In computer graphics and rendering contexts, this occurs due to: - Distance effects: Light intensity decreases with dist...

The Phong illumination model is a widely-used empirical model in computer graphics that calculates the intensity of light reflected from a surface by combining three components: ambient, diffuse, and specular reflection. For specular reflection specifically...

1. Faceted Appearance - Flat shading produces a visually faceted or polygonal appearance on curved surfaces - Each polygon is rendered with a single uniform color, making individual faces clearly visible - This creates an unrealistic, blocky look that does ...