How can i create the 'Non-see-through brush' when brushes overlap !!!

Hi, guys. I'm web comic artist in South Korea. I really need your help. I need your advice.

(I'm grateful for your advice about my previous discussion, but i guess i wrote it hard to understand problem. So i rewrite.)

I created a brush. It's  something  wrong.

Draw the line and make a new layer below.

fill the color inside line using the paint.

and then I merged two layers.

(Two layer were Normal, Opacity 100% ,Fill 100%)

(Brush was Normal, Opacity 100%)

(Paint was Normal, Opacity 100%)

(Merged Layer was Normal, Opacity 100%, Fill 100%)

(Color was purple.)

Made the brush, and used it.

But they are see-through each other like controlled the opacity.

(I made one layer(name is A), and used my brush clicked twice in A layer. That layer was normal, opacity 100%, fill 100%)

Clearly, I filled solid color inside line.

But how does it see-through...

I know non-see-through when i create the brush filling black color inside line.

But my brush is flower, there are details inside the outline. If i fill it black color, can't see the details.

Even though the brush color is not purple, it's OK.

Must show details, must non-see-through when brushes overlap without separating the layers...............

How can i do..

please....