meshviewer/scss/mixins/_shadow.scss

// Original is in LESS and can be found here: https://gist.github.com/gefangenimnetz/3ef3e18364edf105c5af
@mixin shadow($level: 1) {
  @if $level == 1 {
    box-shadow: 0 1px 3px transparentize($color-black, .88), 0 1px 2px transparentize($color-black, .76);
  } @else if $level == 2 {
    box-shadow: 0 3px 6px transparentize($color-black, .84), 0 3px 6px transparentize($color-black, .77);
  } @else if $level == 3 {
    box-shadow: 0 10px 20px transparentize($color-black, .81), 0 6px 6px transparentize($color-black, .77);
  } @else if $level == 4 {
    box-shadow: 0 14px 28px transparentize($color-black, .75), 0 10px 10px transparentize($color-black, .78);
  } @else if $level == 5 {
    box-shadow: 0 19px 38px transparentize($color-black, .7), 0 15px 12px transparentize($color-black, .78);
  }
}