シグネチャ
ドキュメント：
セマンティクス | Microsoft Learn [公式]
法線マップ (Normal Map)
動画：
#1 Normal Mapping (Ben Cloward)
参考：
Implementing Normal Mapping – Stack Overflow
Rotating a vector by another vector – Game Development Stack Exchange
視差マッピング
リンク：
Parallax Mapping with Offset Limiting (Terry Welsh / PDF) | Infiscape
参考：
Parallax Normal Mapping Demo | dhpoware
Relief Mapping
リンク：
An Efficient Representation for Surface Details (Oliveira Neto / PDF) | UFRGS
参考：
Relaxed Cone Stepping for Relief | NVIDIA Developer
Relief Mapping | Shintaro Iguchi
How do you calculate the depth offset? – GameDev.net
接空間
参考：
Tangent space matrix from Normal – GameDev.net
How to calculate Tangent and Binormal? – Stack Overflow
How do I build my tangent space matrix? – Computer Graphics Stack Exchange
