Too lazy to search over but I remember we almost started to fight, however, go fix that signature already.
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You've darken the left part and lightened the right part of the signature therefore, the render should be fixed as well, for example, add lightning sources in the back of it's right part where the lightning is coming and darken the left part where you did on the left part.
Don't accept this as a hate or anything, just telling you what to fix.