| Color | Depth |
|---|---|
 |  |
Rendering a polygon means filling pixels
Color buffer contains RGB color of each pixel drawn
Depth buffer contains depth of each pixel drawn
| Color | Depth |
|---|---|
| |
When drawing a new pixel, compare new depth to what's stored in depth buffer
| Color | Depth |
|---|---|
 |  |
Polygons can be drawn in any order
Polygons can intersect