Custom Split Normals Blender

[asherppan (concat_nate)]

I’m having trouble understanding custom split normals data and how to use them.

In the following video, the “S” is somehow able to maintain one dark/light side no matter the orientation, but the “X” basically has a constant dark/light side based on world orientation instead of the mesh’s.
(Also, the dark/light I’m referring to isn’t the texture, the texture for both sides are consistent, but it seems like depending on the normals, the lightness/darkness is rendered differently.)

How would I edit the X to be like the S?
Also why are some faces light, some faces medium, and some faces dark?

edit: i figured out i could do it by adding a bevel modifier to a cube and cloning the split normal data, but this seems very hacky. any way to actually edit normals rather than copying?

[Redluo]

I have some experience in Blender, hopefully enough to help out lol*

Have you tried enabling FaceOrientation to see the normals better? (blue = correct face, red = uh oh)

One thing I think might work is using the Solidify modifier. So that either way, it’ll always be light.

[asherppan (concat_nate)]

face orientation is the same, its the split normals im asking about

[GE_0E]

open the modeling tab and click this

and then click the middle option or the 2nd option so that you can see the split normals

now press CTRL + N and click on this

now you should be able to edit the split normals am not sure how to make X look like S tho,