Question about the displacement and specular functions.

[AeroDEmi]

Hi there!

I just wanted to know the algorithm you've used in the displacement and specular functions.
I want to translate into python, so I don't know much about js.

For both functions you transform to grayscale using this function:
v = 0.2126*r + 0.7152*g + 0.0722*b

For the displacement map I see the this.contrastImage function but when I try to use console log inside it, it does not show anything.
Can you help me clear how the displacement and the specular function works pixel-wise?
Thank you.

[cpetry]

Hello,

I'm not completely sure what your question is.
The input height image 'should' be in grayscale. Often though colored images are used. I guess many users can live with this false interpretation of the resulting normal map.
The grayscale image is then altered by a few parameters: invert, contrast, blur/sharp.
With these parameters you can adjust the displacement map to your liking until it fits your needs.

For professional usage/creation of specular maps you don't use a height map. This normally doesn't make sense at all.
But if you 'subselect' a specific height value by adjusting strength, mean, range, this could work for some materials.
Depends on what you try to achieve.