Pixel depth explanation needed

Development Rendering
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1

Hello community

Can me someone explain pixel depth? Or verify if my understanding is right?

Pixel dept gives me the distance between camera and rendered pixel. Is this output a float for each pixel?
Then why divide PixelDepth with 2048?
A pixel thats more far away than 2048 gives then a value over 1.
A near pixel (shorter away than 2048) gives an value under 1.

The power makes values under 1 smaller and values over 1 bigger.

And then comes the clamp from 0 to 1. therefore the green has no more gradient because the clamp cuts the value 1. These were the pixel further away than 2048 units?.

Thanks

2

It simply makes it where it fades between the two colors over the distance of 2048. Once it is over that, it is solid There is still a gradient because it uses the divide, and then a lerp. If it used an if or some method based off of floor or ceil, then that would be a different story. Lerp is supposed to take in no more than 1 as a maximum value, hence they clamped it to prevent the strange behavior of using invalid alphas in a lerp.