hi there. i'm trying out portrait retouching with affinity, total noob here. i've been watching video tutorials on youtube. i might be doing something wrong here, or something i dont understand, when i use freq separstion it adds noise and oversharpens my photo on the high freq layer, how much depends on the radius i choose. with all layers visible the effect isnt there, it shows up when the low freq layer is unchecked.
heres what im doing, duplicate background layer> apply freq separation on duplicate layer> apply gausian blur on low freq> apply invert mask> paint face> etc etc. the problem shows up after the inverted mask, it not just hides the gaussian blur but the low freq layer as well, i can get the skin smooth by painting the face but the rest of the photo looks oversharpened and noisy.
what am i doing wrong?