When using bud.alias with SCSS (SASS) (bud-sass), you can use the alias functions by prefixing them with a tilde sign (~), like so (note: ~@images used in the example is a predefined alias added by @roots/sage):
.test {
background: url("~@images/background/test.jpg");
}
Without that tilde sign (~) the path isn’t correctly interpolated when compiling the SCSS.