I have the same problem all the time I want to add a mane to my presets D:
If I simply color over the ManeMask and don't add the mane shade it's working, but it looks blockish and ugly.
But when I add it, the mane looks see-through like that.
I think it's a weird glitch or something.
o3o i'm not sure if i got what you meant but with the mane mask in GIMP you gotta go to;
Layer > Transparency > alpha to selection
and then you just color it in and it won't go over the transparency lines.
And also then with the mane shading you go to;
File > open as layers > go into Feral heart > media > Textures > Fmaneshade.jpg > open it > layer > Transparency > color to alpha (make sure the color in that box is white) > then press okay > go back to layer > transparency > alpha to selection. Then go to Select > invert. And then just rub out the part of the bottom where the transparency layer was. o3o.
Damn Hope you understood that sorry im bad at explaining. Oh and make sure you go back to layer and press "merge down", or gimp will get angry and refuse to save it.
And i also have the same problem with my name, then infront of a waterfall the mane suddenly partly dissapears, anyone know whats going on there?