Amplify Shader - Outline - Blue and green color is transparent

[Grelle]

Hello! I’m newbie in shaders, so I can’t understand why my shader is not work.
I using Amplify Shader Editor to create Outline shader for SpriteRenderes (not 3D Objects).
I used tutorial for Unity Shader Graph (why not use shader graph? We cant use URP at this moment). https://www.youtube.com/watch?v=FvQFhkS90nI
It almost work except one moment - outline coloring.

Problem is: when I set color in unity, blue color became transparent!

I dont understand why it works so. I have feeling I dont understand some basic principles.

[Grelle]

[Torbach]

what is going into the Subtraction node before clamp? the color channel?

the clamp vector4 (-> subtraction) might be tracked as Yellow (i.e. blue = 0)

if that is what you are doing then vertex blue is going to become 0
you might need to use only the alpha channel to make the outline, but we can’t see the rest of the graph

[Grelle]

Sorry! This is full shader screen. It is texture alpha offsets and adds before clamp.

[Torbach]

well nothing looks wrong, but we can try to deduce a fix.

isolate just the vertex alpha for the opacity input
use another mult node for the emissive input

[Grelle]

Sorry, it seem I cant understand you (lack of termins knowledge too).
Vertex alpha - it is Alpha channel from Texture Sample?
Mult node, that you draw, is just the same I already have.
If I use only texture opacity, outline doesnt draw (it is clear why);
And I dont understand purpose of multiply Subscract and Color Alpha.
Althrough, I tried; it didn’t result somehow (in any possible node connections).

[Grelle]

I found soluton; thank you for replying me!
Problem really was in using R channel in opacity calculating. It doesn’t draw on shader preview, it is very dissappointiong(