I suggest you to copy this (brush) layer several times.

The grudge illustration

Let's say 4. But maybe we will note some of them, will see.

Here is the layer order

The grudge illustration

Maybe some layer styles will help.

The grudge illustration



The grudge illustration



The grudge illustration


Result.

The grudge illustration

Place one of the copies right here and use layer styles too.

The grudge illustration



The grudge illustration

.

The grudge illustration

Result.

The grudge illustration