Custom background image for buttons

Developing with Concrete
1

I am using the standard Concrete5 btn css for buttons. However, I want to use a background image texture instead of the standard solid color.

How can I do this please?

2

Couldnt you just use

.btn {
background-image:url(“your-file-path”);
background-size:cover;
}

in your theme or even in the ‘additional header code’ setting?