@Photomaster
i just posted a mini tut
viewtopic.php?f=10&t=368It is a bit minimalistic suppose you have gmic already instyalled
But the basic are there.
For a more advanced used...just remember then layermask may be added also later on to correct the result (without the risk to mess up) and that a effective way to use a layermask is ...activate the layermask but watching not the layermask but the visible
If you like the complessive effect of a "effect layer" but not what does on a certain spot (a face ,o object the sky ) ?
just add a layermask and paint with black at low opacity on that mask (but again watching the visible! that for me is the most important to have control on the result...a layermask is important not for how it looks but foe what does )on that spot to attenuate or remove completly the effect )