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Why is the space between these vertices getting bigger, the further they are apart from the original mesh? How can they be spaced equally across the y axis?

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  • $\begingroup$ Maybe because they are set to be displaced along normal axes in settings of Displace modifier $\endgroup$
    – Mr Zak
    Feb 13, 2021 at 14:51

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When converting a color (RGB) value to a scalar (just one value), you want to set all three channels of the RGB trio to the same value. Here, I think you changed the Value of the HSV trio describing the color. the exact conversion equation may vary from software to software, but here it should work like that.

For instance, a color of (R:0.2,G:0.2,B:0.2) can also be noted as (H:0,S:0,V:0.485). So the value is not linearly correlated to the mean of the RGB values.

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The displacement using levels of 0.2 on the RGB channels instead of HSV :

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How to convert rgb to hsv : enter image description here

Source

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