[DirectX 7 Programmer's Reference] Flat Shading (94.2307692307692%)

Microsoft DirectX 7.0 > Direct3D > Direct3D Immediate Mode > Getting Started with Immediate Mode > 3-D Coordinate Systems and Geometry > Shading > Shading Modes

[DirectX 3 Programmer's Reference] Flat (17.2494824016563%)

Direct3D > Retained-Mode Overview > Introduction to Direct3D Retained-Mode Objects > IDirect3DRMWrap Interface

[DirectX 5 Programmer's Reference] Flat (16.3333333333333%)

DirectX Media > Direct3D Retained-Mode > Direct3D Retained-Mode Overview > Direct3D Retained-Mode Architecture > IDirect3DRMWrap Interface