Why can't I get as-advertised gradual transparency when i save images i make in paint.net as PNG, while the same thing done in photoshop gives me the wanted level of transparency? (I don't want to use photoshop as it's too complicated, its UI is worse and i just love the line/curve tool in paint.net. btw, will pn 4.0 support more adjustment points in the curve? Also will there be the option of using just lines, so whenever i'm done drawing a line it will allow me to draw another one without having to press enter or select some other tool or other?)
But i'm sidestepping.
Here's the issue.
I have a background layer which is transparent. On top of that I have a drawing of something with soft edges, nicely blending into the background. When i save the file as PNG, on auto settings, the saved result will be an image which does have a transparent background but those edges will not be transparent. Instead, it is as if the program mixed my pixels from the drawing with grey pixels in all the areas where opacity is over 0 but less than 100%. Nontransparent pixels are fine, fully transparent pixels are fine, its just that those semitransparent pixels get mixed with gray. So i get a grayish outline around my drawing.
I played with manual settings when saving the file as PNG, setting the transparency treshold to various values, but to no avail. Low settings (like 25) give me that grayish outline, high settings (over 200) remove the nice gradual edges from my image altogether.
What am I doing wrong?
Thank you.