There is no side effect that I’ve noticed apart from the emmisive receiving shadows, that is why I wanted to create a parameter to use as multiplier instead of using a hardcoded multiplier of 0.18 , but i don’t know how to do this.
Also I don’t know how to create a parallel shader that can be released as an add-on, if someone can guide me I’ll be happy to do it and release it free 
The shader is working perfectly in my builds BTW and the link you posted is not working
Cheers and heppy new year!
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…didn’t notice the side effect, it might be annoying in specific contexts. Your offer to work on this is great, hopefully someone with more specific knowledge will dive in and give a helping hand.
Sorry for the broken link! Here you go: