Lumen - Material Pass Replace Node

Having played with Lumen and the material editor for a while this morning, it sorely stood out to me that Lumen does not use any of the existing Switch/Replace nodes in the Material Editor, nor does it have its own.
Currently, if one would want an emissive surface to be 1 intensity on-screen, but 1000 intensity for Lumen, that’s not possible, while it’d be an incredibly useful control to have for artistic direction.

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On ue5-main there’s a LUMEN_CARD_CAPTURE define, so you can do something like this in a custom node:

return InputA; 
return InputB;

I’m a total novice with custom nodes but I tried your idea with, what I think, is correct syntax.
Getting and ‘Undeclared Identifier’ for ‘LUMEN_CARD_CAPTURE’.

Would you be up for playing around with this for a min and seeing if you can get your idea working?
I know there’s a few posts that have already requested this feature, so at least a few people would be grateful.

Thanks in advance

What Phyronnaz put in his post is the exact syntax you want in your custom code block. Hashtags and all. You don’t want to create a regular 'ole branch, you want to define a switch, hence the hashtags and endif.
On top of that, keep in mind that it only works on ue5-main. If you’re using the launcher build (ue5-ea) it won’t work.

Thanks, I would never have known that. I’m just using the EA build from the launcher as you might have guessed.