The effect enables developers to create the impression of sprawling worlds that continue toward the horizon.Ī particular utilization technique with Mode 7 allows pixels of the background layer to be in front of sprites. This graphical method is suited to racing games, and is used extensively for the overworld sections of role-playing games such as Square's popular 1994 game Final Fantasy VI. Īll arithmetic is carried out on 16-bit signed fixed point numbers, while all offsets are limited to 13 bits. The 2D affine transformation is specified for each scanline by 6 parameters: a. Mode 7 graphics are generated for each pixel by mapping screen coordinates to background coordinates using an affine transformation and sampling the corresponding background color.
In this way, pseudo-perspective, curved surface, and distortion effects can be achieved. However, many games create additional effects by setting a different transformation matrix for each scanline. Two-dimensional affine transformations can produce any combination of translation, scaling, reflection, rotation, and shearing. The last one (background mode 7) has a single layer that can be scaled and rotated. The Super NES console has eight graphics modes, numbered from 0 to 7, for displaying background layers. Similar faux 3D techniques have been presented on a few 2D systems other than the Super NES, in select peripherals and games. Mode 7 was one of Nintendo's prominent selling points for the Super NES platform in publications such as Nintendo Power and Super NES Player's Guide. Thus, an impression of three-dimensional graphics is achieved.
This transforms the background layer into a two-dimensional horizontal texture-mapped plane that trades height for depth. The most famous of these effects is the application of a perspective effect on a background layer by scaling and rotating the background layer in this manner. Mode 7 is a graphics mode on the Super Nintendo Entertainment System video game console that allows a background layer to be rotated and scaled on a scanline-by-scanline basis to create many different depth effects.
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