I know how to use the .9.png tool to make a common .9.png, but I want to use the tool to make a gradual png.
First I make a gradual PNG using Photoshop, then I put the the .9.png into the .9 tool. The gradual PNG is changed, sometimes the change is very big, so the .9.png gradual PNG doesn't look good.
So my question is if there is some skill or trick to make a good .9.png with a gradual effect. I do not want to use common gradual PNG because it occupies too much space, and the built-in system .9.png doesn't look good either. Can you give me some advice?