RE: [Algorithms] Direct Sunlight Lighting Model

[<Pau...@sc...>]

gda...@li... wrote on 25/11/2005 
10:43:31:

> You can experiment with different soft-clipping schemes, to avoid 
> the hard-clipping at the output of the pixel stage, like
> result = 1 - exp( 1 - result )
> result = 1 / ( 1 + result )
> etc
> these have the property of being proportional for low brightness but
> asymptotically reach 1 for increasing brightness.

Just to clarify, this is in a pixel shader?

So you're able to get around the 'texture function' which modulates the 
texel colour with the interpolated vertex colour?

e.g. normally with near black texels in a texture its impossible to 
brighten these up by much with vertex colours, certainly not up to white? 
This is due to the 8 bit precision...

I'm coming from a ps2 background here, so bare with me if this stuff is 
obvious... :-)

Cheers, Paul.

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