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I'll have a look at it for the next update

Shader Forge doesn't support betas in general, so this is expected at the moment I'm afraid

What did you do when it happened / do you have a repro case?

Telling me I made a bad decision and calling my code awfully designed won't help. Telling me which Unity and SF version you were using, and when/how you triggered it, will though.

Yeah that's not good, reopening this

Although it's a bit weird that you're getting an error from it

Use the append node, and append RGB with A, and you'll get a float4

Closing thread in that case :)

That looks like standard depth sorting issues, which you'll get with any alpha-blended, even with Unity's built-in ones. Or was the issue something else?