Shader packs
Shaders (prepared effects) collected by playing every chapter, for the PC port's launcher to download. You don't need to download these by hand: open the launcher, and on the Play page click Download shader pack (or Check for a newer pack). It is merged into your shader cache in Documents\king_kong\cache, and the game prepares everything in it each time it starts, so it never pauses for a new effect.
Pack 1: 4,652 pipelines and 2,362 shaders, from all 42 chapters played by the automatic test build plus hand-played sessions. For DirectX 12 on NVIDIA and AMD graphics cards (Intel cards use a different render path and only get part of the benefit).
The files are the game's own shaders as captured while playing, so they only work with your own copy of the game, installed through the launcher.