Thanks irSindaco.
I wrote him a comment in that post because I don´t know if the re-compilation of the full engine is needed, if that is the case I don´t think it´s worth it, I prefer to be able to upgrade my engine without having to recompile it, if it´s just a modification that can be done without making a full recompile then I´ll look into it to create a custom “Selflit Shadowed” or somethign similar.
Cheers!