This video continues to build on what we did in the previous tutorial, found here https://youtu.be/Pe3Yt3DUp04
While the video is recorded in UE4, it should work exactly the same in UE5.
The wikipedia pages I'm referencing in this video are the following:
https://en.wikipedia.org/wiki/Relative_luminance
https://en.wikipedia.org/wiki/Dot_product
https://en.wikipedia.org/wiki/Sobel_operator
https://en.wikipedia.org/wiki/Rotation_matrix
The files are available on Gumroad here https://matthijsv.gumroad.com/l/VGNLO
I'd strongly recommend following along with the tutorial, rather than buying the files.
0:00 introduction
2:51 making the filter anisotropic
5:59 relative luminance
7:38 dot product
8:54 sobel operator
18:01 don't divide by 0
19:00 putting the directional kuwahara filter together
23:18 texelSize fix
23:37 results & outro