Documentation

This section lists documentation pages for resources you'll find in Sonic games. You'll find information about certain file formats and other general game resources.

Rendering

Name	Info
Normal mapping	How normal mapping works
Vertex Colors	How vertex colors work
Mesh Layers	Model mesh layers
Opacity	The concept of opacity explained
Texture Blending	The different ways to blend textures
Hedgehog Engine	Render engine first used in Sonic Unleashed
Hedgehog Engine 2	Render Engine first used in Sonic Forces

Models

Name	Info	Extension	Tools
SCA Parameters	Model and material parameters stored in SCA file headers

Shaders

Name	Info	Extension	Tools
Shader Features	Hedgehog engine 1 shader features

Set-Data

Name	Description	Extension	Tools
HSON (Hedgehog Set Object Notation)	Universal object placement representation format.	.hson

User Interface

Name	Description	Extension	Tools
NCP (Ninja CellSpriteDraw Project)	Describes a user interface in most Hedgehog Engine games.	.xncp .yncp .gncp .sncp	Kunai Shuriken

Archives

Name	Description	Extension	Tools
NN Chunk	Generic container format.

Animation

Name	Description	Extension	Tools
PXD Animation	Skeleton and skeletal animation format in Hedgehog Engine 2 Games	.anm.pxd .skl.pxd	Frontiers Animation Tools
PBA Skeleton	Physics Based Animation Skeleton for Hedgehog Engine 2 Games	.pba