The Legend of Zelda: Twilight Princess (GC)

In The Legend of Zelda: Twilight Princess, the next chapter in The Legend of Zelda series, Link can transform into a wolf to scour the darkened land of Hyrule. With the help of Midna, a mysterious being, you must guide Link through hordes of foul creatures and challenging bosses using new moves and a new horseback combat system. Many puzzles stand between Link and the fulfillment of his quest, so you must sharpen your wits as you hunt for weapons and items.

The GameCube version isn't mirrored like the Wii version and has free camera control. The GameCube version lacks motion controls while the Wii version does not support the GameCube controller. Although it can be patched from 4:3 to 16:9 as detailed below, there's no native widescreen support, unlike the Wii version.

Hyrule Field Slow Down
As the player progress through the game, Hyrule Field will become progressively slower. To fix it, enable the "Hyrule Field Speed Hack" in the ISO properties (right click the game in the game list > Properties > Patches tab > Hyrule Field Speed Hack). The NA and EU releases had the patch added to their GameINIs in, then JP was added in.

Unfortunately, the hack will reduce the quality of the minimap, so be warned.

Minimap

 * On Direct3D api, minimap will have some noise artifacts if Anti-Aliasing, Anisotropic Filtering, or Texture Filtering are enabled. Disable all 3 in order to get "clean" map. For OpenGL, disable Anti-Aliasing.
 * The Hyrule Field Speed Hack can also cause issues with the minimap.

Sun Rays
Twilight Princess uses a ray effect at various points throughout the game, most notably at windows and the fountains. The effect is very easily broken. How it is broken depends on the backend used:
 * D3D - Anti-aliasing and an Internal Resolution above 1x Native damage the effect. Possibly fixed in, or at least made equivalent to OpenGL.
 * OpenGL - The GLSL merge greatly improves the effect in OpenGL. It is now only affected by Anisotropic Filtering and an Internal Resolution above 1x Native.

16:9 Aspect Ratio Fix
The built-in Widescreen Hack causes clipping and reflection issues. The following Action Replay codes work as a replacement, causing fewer issues. To avoid conflicts, make sure that Widescreen Hack is disabled while using these codes.

Note: there were previously Gecko codes in this article. While they don't stretch the HUD, they can cause other display issues, some are game-breaking issues.

NTSC-U
0445391C 3FE38E39

NTSC-J
0444DA64 3FE38E39

PAL
044558DC 3FE38E39

Reduce Bloom Ghosting
Due to Dolphin's bloom issues with Store EFB Copies to Texture Only, a "ghost" image will appear around certain objects in areas with high amounts of bloom. To disable bloom completely, use an Action Replay code below. 

No Bloom Effects [Ralf] 04009650 4E800020

Disabling Scaled EFB Copies can also reduce bloom ghosting at higher resolutions, by rendering the effect at its native resolution. It may, however, render other effects at the native resolution, and can decrease the clarity of these effects at higher resolutions.

HD Textures
There are many texture packs available:


 * By Victor Rosa. Their site is here.
 * This texture pack is incomplete and is in progress.


 * By ZeldaGamer23. Their site is here.
 * This texture pack is incomplete and is in progress. It is intended to be released April 2016.