Wii U Shader
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What is a GSH file?
A GSH file is a shader included in a Wii U video game. It is used to produce in-game visual effects. GSH files are often paired with accompanying .GTX files.
Shaders are programs that tell a game how to render pixels in different conditions, to produce lighting, shadow, and texture effects. Many Wii U games use shaders saved as GSH files. For example, Mario Kart 8 uses GSH shaders.
NOTE: GSH stands for GX2 SHader.
How to open a GSH file
GSH files are not meant to be opened by players.