FViewUniformShaderParameters / Custom Node / not working

Hey everyone,

I’m playing with some distance field stuff right now and would like to use some Uniforms from FViewUniformShaderParameters. They were mentioned a while ago in Ryan Brucks talk in the training.

I’m getting erros for everything.
For example the same Parameters Ryan used in the training: View.ExposureScale;

[SM5] /Engine/Generated/Material.ush(1590,1-4): error X3004: undeclared identifier ‘View’

What did change in the meanwhile? Can I still use them in a Custom Node within the shader editor?
I’m on 4.23 Final.

Really appreciate any help,