@mixin perspective($depth: none) {
  @include _bourbon-deprecate-for-prefixing("perspective");

  // none | <length>
  @include prefixer(perspective, $depth, webkit moz spec);
}

@mixin perspective-origin($value: 50% 50%) {
  @include _bourbon-deprecate-for-prefixing("perspective-origin");

  @include prefixer(perspective-origin, $value, webkit moz spec);
}