Toon Liquid Sader Android build problem

Hi! i have a shader from here:
https://www.bitshiftprogrammer.com/2018/08/toon-liquid-shader-unity-shader.html

everything looks good in the editor, but when I build it on android, on the phone screen the container above the liquid level becomes black and opaque, can someone tell me what's the matter and how to fix it? Thank you!

 

I would think there's something wrong with the last line in the fragment shader:
return facing > 0 ? finalResult : topColor;

If i understand you right, then only topColor results in Black, but the sides are colored correct?
Try setting the graphics api manually to OpenGL ES3.
I am not sure but from looking at Unitys Shader Library, i'd think that maybe this Semantic on the top of the Frag Shader : "fixed facing : VFACE" could be wrong in Vulkan.

Another wild guess, if switching to OpenGL ES3 doesnt work you could try to comment out this line in the shader :
AlphaToMask On // transparency
and see if this helps. I remember that i had problems with alpha to mask with some unity versions.
Did you enable MSAA fpr the build's graphic settings and on the camera ?

 

if i comment this lin then object became black even in editor, in build nothing changes.OpenGLES3 checked

 

Can you post a screenshot of the error in your android build? Usually the shortcut is pressing Volume- and Power Button

 

@Ramazoid Did you fix this issue? I am facing the same problem even in the editor. My Unity version is 2020.3.11f1.

Someone posted this link in Patreon, looks like it will work on Android:

https://pastebin.com/dQzWDqXh