Static Lighting - Selecting this option essentially switches Clear Sky to DirectX 8 rendering mode.Screenshot comparisons of all five are provided above, and each is explained in detail further below:
Note that the first three modes were available in the original STALKER, but the two 'Enhanced Full Dynamic Lighting' modes are new to Clear Sky, and the DX10 render mode in particular is only available in Vista when using DX10 hardware. The options include (from lowest to highest): Static Lighting, Objects Dynamic Lighting, Full Dynamic Lighting, Enhanced Full Dynamic Lighting, Enhanced Full Dynamic Lighting (DX10). Render: This setting determines the renderer used for generating the game's graphics, and hence has a major impact on the overall visual quality and performance in the game.