Gumroad - 手绘环境设计基础教程 1，2，3，4

Gumroad - Environment Design Basics - 1 Basic Composition & Values，基础合成。

Gumroad - Environment Basics 2 Perspective and Basic Layout by James Paick,透视基础。

Gumroad - Environment Design Basics - 3 Focal Point & Contrast，协调和对比度。

Environment Design Basics - 4 Lighting & Texture，光线和纹理。