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Lerping two colors based on pixel z-axis value

Hi! I would like to lerp my material by two different colors based on the pixel z-axis value. How could I accomplish that?

Thank you!

Product Version: UE 4.15
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asked Apr 05 '17 at 09:48 PM in Rendering

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Iacopo Antonelli
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Hey ginwakeup,

Maybe something like this is what you're looking for? AbsoluteWorldPosition lets you get the pixel location, and then you can us the Mask node to get the Z coordinate.

alt text

If you're using Lightmass, one caveat is that it doesn't seem to use the AbsoluteWorldPosition node; I suspect it just uses 0 when it's baking but I'm not actually sure. In either case, if you're baking your lighting, I wouldn't expect fully accurate bounce lighting from this. If this is for an emissive material or an object that isn't part of a light bake, it should be fine.

zaxiscolorlerp.png (637.7 kB)
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answered Apr 06 '17 at 02:03 AM

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rinbu
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avatar image Iacopo Antonelli Apr 06 '17 at 11:06 AM

Thank you very much! That was exactly what I need.

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