Introduction to the DirectX 9 Shader Models - Nvidia
Introduction to the DirectX 9 Shader Models - Nvidia
Introduction to the DirectX 9 Shader Models - Nvidia
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Single Pass Lighting?<br />
• Putting multiple lights in one pass<br />
leads <strong>to</strong> some issues<br />
– There is still a limit <strong>to</strong> <strong>the</strong> #of lights per<br />
pass that can be handled<br />
• Due <strong>to</strong> 16 samplers or 8 interpola<strong>to</strong>rs<br />
• Or overly long shaders<br />
– What <strong>to</strong> do when light count exceeded?<br />
• Fall back <strong>to</strong> multi-pass<br />
• Drop or merge ‘unimportant’ lights<br />
– Careful of popping and aliasing
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