I am guessing only but I'd say the tutorial forgets to mention that
the upper layer (the blurry one) needs to be set to Screen mode. I can
get a result that comes very close by following the tutorial and
changing the layer mode to "Screen".
What can I say? That's exactly what was missing. Thank you very much!
Most websites are
confused chintzy gaudy conflicting tacky unpleasant... unusable.
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