diff --git a/scss/compiler.py b/scss/compiler.py
index 2394258a..9e70a247 100644
--- a/scss/compiler.py
+++ b/scss/compiler.py
@@ -844,32 +844,32 @@ def _at_magic_import(self, calculator, rule, scope, block):
         Implements @import for sprite-maps
         Imports magic sprite map directories
         """
-        # TODO check that the found file is actually under the root
+
+        to_import = block.argument.strip('"')
         if callable(config.STATIC_ROOT):
-            files = sorted(config.STATIC_ROOT(block.argument))
+            files = sorted(config.STATIC_ROOT(to_import))
         else:
-            glob_path = os.path.join(config.STATIC_ROOT, block.argument)
+            glob_path = os.path.join(config.STATIC_ROOT, to_import)
             files = glob.glob(glob_path)
             files = sorted((file[len(config.STATIC_ROOT):], None) for file in files)
 
         if not files:
             return
 
-        # Build magic context
-        map_name = os.path.normpath(os.path.dirname(block.argument)).replace('\\', '_').replace('/', '_')
+        # Populate namespace with sprite variables
+        map_name = os.path.normpath(os.path.dirname(to_import)).replace(os.sep, '_')
         kwargs = {}
 
         def setdefault(var, val):
             _var = '$' + map_name + '-' + var
-            if _var in rule.context:
-                kwargs[var] = calculator.interpolate(rule.context[_var], rule, self._library)
-            else:
-                rule.context[_var] = val
-                kwargs[var] = calculator.interpolate(val, rule, self._library)
-            return rule.context[_var]
+            if _var not in rule.namespace.variables:
+                rule.namespace.set_variable(_var, val)
+            kwargs[var] = calculator.interpolate(_var)
+            return rule.namespace.variable(_var)
 
         setdefault('sprite-base-class', String('.' + map_name + '-sprite', quotes=None))
         setdefault('sprite-dimensions', Boolean(False))
+        setdefault('layout', String('vertical'))
         position = setdefault('position', Number(0, '%'))
         spacing = setdefault('spacing', Number(0))
         repeat = setdefault('repeat', String('no-repeat', quotes=None))
@@ -878,7 +878,7 @@ def setdefault(var, val):
             setdefault(n + '-position', position)
             setdefault(n + '-spacing', spacing)
             setdefault(n + '-repeat', repeat)
-        rule.context['$' + map_name + '-' + 'sprites'] = sprite_map(block.argument, **kwargs)
+        rule.namespace.set_variable('$' + map_name + '-' + 'sprites', sprite_map(block.argument, **kwargs))
         ret = '''
             @import "compass/utilities/sprites/base";
 
diff --git a/scss/functions/compass/sprites.py b/scss/functions/compass/sprites.py
index 908adcd0..b62b7a44 100644
--- a/scss/functions/compass/sprites.py
+++ b/scss/functions/compass/sprites.py
@@ -99,7 +99,7 @@ def sprite_map(g, **kwargs):
     Generates a sprite map from the files matching the glob pattern.
     Uses the keyword-style arguments passed in to control the placement.
 
-    $direction - Sprite map layout. Can be `vertical` (default), `horizontal`, `diagonal` or `smart`.
+    $direction, $layout - Sprite map layout. Can be `vertical` (default), `horizontal`, `diagonal` or `smart`.
 
     $position - For `horizontal` and `vertical` directions, the position of the sprite. (defaults to `0`)
     $<sprite>-position - Position of a given sprite.
@@ -123,7 +123,7 @@ def sprite_map(g, **kwargs):
     now_time = time.time()
 
     globs = String(g, quotes=None).value
-    globs = sorted(g.strip() for g in globs.split(','))
+    globs = sorted(g.strip(' "') for g in globs.split(','))
 
     _k_ = ','.join(globs)
 
@@ -151,7 +151,7 @@ def sprite_map(g, **kwargs):
                 if _files:
                     files.extend(_files)
                     rfiles.extend(_rfiles)
-                    base_name = os.path.normpath(os.path.dirname(_glob)).replace('\\', '_').replace('/', '_')
+                    base_name = os.path.normpath(os.path.dirname(_glob)).replace(os.sep, '_')
                     _map_name, _, _map_type = base_name.partition('.')
                     if _map_type:
                         _map_type += '-'
@@ -166,7 +166,13 @@ def sprite_map(g, **kwargs):
             log.error("Nothing found at '%s'", glob_path)
             return String.unquoted('')
 
-        key = [f for (f, s) in files] + [repr(kwargs), config.ASSETS_URL]
+        # sorting kwargs representation to ensure hash repeatability
+        kwargs_repr = ""
+        for k in sorted(kwargs.keys()):
+            kwargs_repr += ("'%s': %s, " % (k, repr(kwargs[k])))
+        kwargs_repr = str("{%s}" % kwargs_repr.strip(', '))
+
+        key = [f for (f, s) in files] + [kwargs_repr, config.ASSETS_URL]
         key = map_name + '-' + make_filename_hash(key)
         asset_file = key + '.png'
         ASSETS_ROOT = config.ASSETS_ROOT or os.path.join(config.STATIC_ROOT, 'assets')
@@ -204,7 +210,9 @@ def sprite_map(g, **kwargs):
 
         if sprite_map is None or asset is None:
             cache_buster = Boolean(kwargs.get('cache_buster', True))
-            direction = String.unquoted(kwargs.get('direction', config.SPRTE_MAP_DIRECTION)).value
+            direction = String.unquoted(kwargs.get('direction',
+                                        kwargs.get('layout',
+                                        config.SPRTE_MAP_DIRECTION))).value
             repeat = String.unquoted(kwargs.get('repeat', 'no-repeat')).value
             collapse = kwargs.get('collapse', Number(0))
             if isinstance(collapse, List):
@@ -326,6 +334,7 @@ def images(f=lambda x: x):
 
             offsets_x = []
             offsets_y = []
+            selectors = []
             for i, image in enumerate(images()):
                 x, y, width, height, cssx, cssy, cssw, cssh = layout_positions[i]
                 iwidth, iheight = image.size
@@ -359,6 +368,13 @@ def images(f=lambda x: x):
                 offsets_x.append(cssx)
                 offsets_y.append(cssy)
 
+                # extracting selector for compass spriting's magic selectors
+                # http://compass-style.org/help/tutorials/spriting/magic-selectors/
+                name = os.path.splitext(os.path.basename(image.filename))[0]
+                spl = name.split('_')
+                selector = spl[-1] if len(spl) > 1 else None
+                selectors.append(selector)
+
             if useless_dst_color:
                 log.warning("Useless use of $dst-color in sprite map for files at '%s' (never used for)" % glob_path)
 
@@ -388,12 +404,13 @@ def images(f=lambda x: x):
                 asset = file_asset = List([String.unquoted(url), String.unquoted(repeat)])
 
             # Add the new object:
-            sprite_map = dict(zip(tnames, zip(sizes, rfiles, offsets_x, offsets_y)))
+            sprite_map = dict(zip(tnames, zip(sizes, rfiles, offsets_x, offsets_y, selectors)))
             sprite_map['*'] = now_time
             sprite_map['*f*'] = asset_file
             sprite_map['*k*'] = key
             sprite_map['*n*'] = map_name
             sprite_map['*t*'] = filetime
+            sprite_map['*s*'] = new_image.size
 
             sizes = zip(files, sizes)
             cache_tmp = tempfile.NamedTemporaryFile(delete=False, dir=ASSETS_ROOT)
@@ -469,7 +486,9 @@ def sprite_classes(map):
 @register('sprite', 3)
 @register('sprite', 4)
 @register('sprite', 5)
-def sprite(map, sprite, offset_x=None, offset_y=None, cache_buster=True):
+@register('sprite', 6)
+def sprite(map, sprite, offset_x=None, offset_y=None, use_percentages=False,
+           cache_buster=True):
     """
     Returns the image and background position for use in a single shorthand
     property
@@ -486,14 +505,20 @@ def sprite(map, sprite, offset_x=None, offset_y=None, cache_buster=True):
         url = '%s%s' % (config.ASSETS_URL, sprite_map['*f*'])
         if cache_buster:
             url += '?_=%s' % sprite_map['*t*']
-        x = Number(offset_x or 0, 'px')
-        y = Number(offset_y or 0, 'px')
-        if not x.value or (x.value <= -1 or x.value >= 1) and not x.is_simple_unit('%'):
-            x -= Number(sprite[2], 'px')
-        if not y.value or (y.value <= -1 or y.value >= 1) and not y.is_simple_unit('%'):
-            y -= Number(sprite[3], 'px')
+        unit = '%' if use_percentages else 'px'
+        coors = [Number(offset_x or 0, unit), Number(offset_y or 0, unit)]
+        map_size = sprite_map['*s*']
+        for i, coor in enumerate(coors):
+            if not coor.value or (coor.value <= -1 or coor.value >= 1) \
+            and (coor.is_simple_unit('%') and unit == '%' or
+                 coor.is_simple_unit('px') and unit == 'px'):
+                value = sprite[i + 2]
+                if use_percentages and value:
+                    value = -100.0 * value / (map_size[i] - sprite[0][i])
+                coors[i] -= Number(value, unit)
+
         url = "url(%s)" % escape(url)
-        return List([String.unquoted(url), x, y])
+        return List([String.unquoted(url)] + coors)
     return List([Number(0), Number(0)])
 
 
@@ -530,7 +555,9 @@ def has_sprite(map, sprite):
 @register('sprite-position', 2)
 @register('sprite-position', 3)
 @register('sprite-position', 4)
-def sprite_position(map, sprite, offset_x=None, offset_y=None):
+@register('sprite-position', 5)
+def sprite_position(map, sprite, offset_x=None, offset_y=None,
+                    use_percentages=False):
     """
     Returns the position for the original image in the sprite.
     This is suitable for use as a value to background-position.
@@ -544,23 +571,50 @@ def sprite_position(map, sprite, offset_x=None, offset_y=None):
     elif not sprite:
         log.error("No sprite found: %s in %s", sprite_name, sprite_map['*n*'], extra={'stack': True})
     if sprite:
-        x = None
-        if offset_x is not None and not isinstance(offset_x, Number):
-            x = offset_x
-        if not x or x.value not in ('left', 'right', 'center'):
-            if x:
-                offset_x = None
-            x = Number(offset_x or 0, 'px')
-            if not x.value or (x.value <= -1 or x.value >= 1) and not x.is_simple_unit('%'):
-                x -= Number(sprite[2], 'px')
-        y = None
-        if offset_y is not None and not isinstance(offset_y, Number):
-            y = offset_y
-        if not y or y.value not in ('top', 'bottom', 'center'):
-            if y:
-                offset_y = None
-            y = Number(offset_y or 0, 'px')
-            if not y.value or (y.value <= -1 or y.value >= 1) and not y.is_simple_unit('%'):
-                y -= Number(sprite[3], 'px')
-        return List([x, y])
+        unit = '%' if use_percentages else 'px'
+        map_size = sprite_map['*s*']
+
+        coors = [offset_x, offset_y]
+        positions = (('left', 'right', 'center'), ('top', 'bottom', 'center'))
+
+        for i, coor in enumerate(coors):
+            c = None
+            if coor is not None and not isinstance(coor, Number):
+                c = coor
+            if not c or c.value not in positions[i]:
+                if c:
+                    coor = None
+                c = Number(offset_x or 0, unit)
+                if not c.value or (c.value <= -1 or c.value >= 1) \
+                and (c.is_simple_unit('%') and unit == '%' or
+                     c.is_simple_unit('px') and unit == 'px'):
+                    value = sprite[i + 2]
+                    if use_percentages and value:
+                        value = -100.0 * value / (map_size[i] - sprite[0][i])
+                    coors[i] = c - Number(value, unit)
+                else:
+                    coors[i] = c
+            else:
+                coors[i] = None
+
+        return List(coors)
     return List([Number(0), Number(0)])
+
+
+@register('sprite-does-not-have-parent', 2)
+def sprite_does_not_have_parent(map, sprite):
+    map = map.render()
+    sprite_map = sprite_maps.get(map)
+    sprite_name = String.unquoted(sprite).value
+    sprite = sprite_map and sprite_map.get(sprite_name)
+    # if there is no selector, the sprite does not have any parents
+    return Boolean(not sprite[4])
+
+
+@register('sprite-has-selector', 3)
+def sprite_has_selector(map, sprite, selector):
+    map = map.render()
+    sprite_map = sprite_maps.get(map)
+    sprite_name = String.unquoted(sprite).value
+    sprite = sprite_map and sprite_map.get(sprite_name + '_' + selector.value)
+    return Boolean(sprite)
diff --git a/scss/tests/files/kronuz/include/compass/utilities/sprites/_base.scss b/scss/tests/files/kronuz/include/compass/utilities/sprites/_base.scss
new file mode 100644
index 00000000..3a94e686
--- /dev/null
+++ b/scss/tests/files/kronuz/include/compass/utilities/sprites/_base.scss
@@ -0,0 +1,68 @@
+// This file comes from compass (compass-style.org) and is only used in sprite-import test
+
+// Determines those states for which you want to enable magic sprite selectors
+$sprite-selectors: hover, target, active !default;
+
+// Set the width and height of an element to the original
+// dimensions of an image before it was included in the sprite.
+@mixin sprite-dimensions($map, $sprite) {
+  height: image-height(sprite-file($map, $sprite));
+  width: image-width(sprite-file($map, $sprite));
+}
+
+// Set the background position of the given sprite `$map` to display the
+// sprite of the given `$sprite` name. You can move the image relative to its
+// natural position by passing `$offset-x` and `$offset-y`.
+@mixin sprite-background-position($map, $sprite, $offset-x: 0, $offset-y: 0) {
+  background-position: sprite-position($map, $sprite, $offset-x, $offset-y);  
+}
+
+
+// Determines if you want to include magic selectors in your sprites
+$disable-magic-sprite-selectors:false !default;
+
+// Include the position and (optionally) dimensions of this `$sprite`
+// in the given sprite `$map`. The sprite url should come from either a base
+// class or you can specify the `sprite-url` explicitly like this:
+//
+//     background: $map no-repeat;
+@mixin sprite($map, $sprite, $dimensions: false, $offset-x: 0, $offset-y: 0) {
+  @include sprite-background-position($map, $sprite, $offset-x, $offset-y);
+  @if $dimensions {
+    @include sprite-dimensions($map, $sprite);
+  }
+  @if not $disable-magic-sprite-selectors {
+    @include sprite-selectors($map, $sprite, $sprite, $offset-x, $offset-y);
+  }
+}
+
+// Include the selectors for the `$sprite` given the `$map` and the 
+// `$full-sprite-name`
+// @private
+@mixin sprite-selectors($map, $sprite-name, $full-sprite-name, $offset-x: 0, $offset-y: 0) {
+  @each $selector in $sprite-selectors {
+    @if sprite_has_selector($map, $sprite-name, $selector) {
+      &:#{$selector}, &.#{$full-sprite-name}_#{$selector}, &.#{$full-sprite-name}-#{$selector} {
+          @include sprite-background-position($map, "#{$sprite-name}_#{$selector}", $offset-x, $offset-y);
+      }
+    }
+  }
+}
+
+// Generates a class for each space separated name in `$sprite-names`.
+// The class will be of the form .<map-name>-<sprite-name>.
+//
+// If a base class is provided, then each class will extend it.
+//
+// If `$dimensions` is `true`, the sprite dimensions will specified.
+@mixin sprites($map, $sprite-names, $base-class: false, $dimensions: false, $prefix: sprite-map-name($map), $offset-x: 0, $offset-y: 0) {
+  @each $sprite-name in $sprite-names {
+    @if sprite_does_not_have_parent($map, $sprite-name) {
+      $full-sprite-name: "#{$prefix}-#{$sprite-name}";
+      .#{$full-sprite-name} {
+        @if $base-class { @extend #{$base-class}; }
+        @include sprite($map, $sprite-name, $dimensions, $offset-x, $offset-y);
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/scss/tests/files/kronuz/sprite-import.css b/scss/tests/files/kronuz/sprite-import.css
new file mode 100644
index 00000000..dbb99c0d
--- /dev/null
+++ b/scss/tests/files/kronuz/sprite-import.css
@@ -0,0 +1,10 @@
+.squares-sprite, .squares-ten-by-ten, .squares-twenty-by-twenty {
+  background: url(static/assets/squares-frdGCNpwVAfawnKv35k2NA.png) no-repeat;
+}
+.squares-ten-by-ten {
+  background-position: 0px 0px;
+}
+
+.squares-twenty-by-twenty {
+  background-position: -10px 0px;
+}
diff --git a/scss/tests/files/kronuz/sprite-import.py b/scss/tests/files/kronuz/sprite-import.py
new file mode 100644
index 00000000..9a7bc831
--- /dev/null
+++ b/scss/tests/files/kronuz/sprite-import.py
@@ -0,0 +1,20 @@
+"""
+Disables cache_buster on sprite_map for sprite_import test
+"""
+
+from scss import compiler, types
+
+sprite_map_0 = compiler.sprite_map
+
+def sprite_map_patch(g, **kwargs):
+    global sprite_map_0
+    kwargs.setdefault('cache_buster', types.Boolean(False))
+    return sprite_map_0(g, **kwargs)
+
+
+def setUp():
+    compiler.sprite_map = sprite_map_patch
+
+
+def tearDown():
+    compiler.sprite_map = sprite_map_0
diff --git a/scss/tests/files/kronuz/sprite-import.scss b/scss/tests/files/kronuz/sprite-import.scss
new file mode 100644
index 00000000..52717d7b
--- /dev/null
+++ b/scss/tests/files/kronuz/sprite-import.scss
@@ -0,0 +1,4 @@
+$squares-layout:horizontal;
+@import "squares/*.png";
+
+@include all-squares-sprites;
diff --git a/scss/tests/files/kronuz/sprite-pos-percentage.css b/scss/tests/files/kronuz/sprite-pos-percentage.css
new file mode 100644
index 00000000..02fad7d6
--- /dev/null
+++ b/scss/tests/files/kronuz/sprite-pos-percentage.css
@@ -0,0 +1,11 @@
+.mod {
+  background: url(static/assets/squares-nafpKaM4RlNNZcIbS0wv_g.png) no-repeat;
+}
+.mod.ten-by-ten {
+  background: url(static/assets/squares-nafpKaM4RlNNZcIbS0wv_g.png) 0% 0%;
+}
+.mod.twenty-by-twenty {
+  width: 20px;
+  height: 20px;
+  background-position: 0% 100%;
+}
diff --git a/scss/tests/files/kronuz/sprite-pos-percentage.scss b/scss/tests/files/kronuz/sprite-pos-percentage.scss
new file mode 100644
index 00000000..b9968aa8
--- /dev/null
+++ b/scss/tests/files/kronuz/sprite-pos-percentage.scss
@@ -0,0 +1,16 @@
+@option style:legacy;
+
+$images: sprite-map("squares/*.png", $cache-buster: false);
+
+.mod {
+  background: $images;
+  &.ten-by-ten {
+    background: sprite($images, "ten-by-ten", $use-percentages: true, $cache-buster: false);
+  }
+  &.twenty-by-twenty {
+    $file: sprite-file($images, "twenty-by-twenty");
+    width: image-width($file);
+    height: image-height($file);
+    background-position: sprite-position($images, "twenty-by-twenty", $use-percentages: true);
+  }
+}
diff --git a/scss/tests/test_files.py b/scss/tests/test_files.py
index eaaba4c3..9ff0421f 100644
--- a/scss/tests/test_files.py
+++ b/scss/tests/test_files.py
@@ -10,8 +10,10 @@
 
 from __future__ import absolute_import, unicode_literals
 
-import os.path
+import os
 import logging
+import sys
+from importlib import import_module
 
 import six
 
@@ -31,7 +33,16 @@
 def test_pair_programmatic(scss_file_pair):
     scss_fn, css_fn = scss_file_pair
 
-    with open(scss_fn, 'rb') as fh:
+    # look for a python module related to the pair and execute it if found
+    mod = None
+    cfg_script = scss_fn.replace('.scss', '.py')
+    if os.path.exists(cfg_script):
+        sys.path[0:0] = [os.path.dirname(scss_fn)]
+        mod = import_module(os.path.splitext(os.path.split(scss_fn)[1])[0])
+        getattr(mod, 'setUp', lambda: None)()
+        sys.path = sys.path[1:]
+
+    with open(scss_fn) as fh:
         source = fh.read()
     with open(css_fn, 'r', encoding='utf8') as fh:
         expected = fh.read()
@@ -40,11 +51,22 @@ def test_pair_programmatic(scss_file_pair):
     include_dir = os.path.join(directory, 'include')
     scss.config.STATIC_ROOT = os.path.join(directory, 'static')
 
-    compiler = scss.Scss(scss_opts=dict(style='expanded'), search_paths=[include_dir, directory])
-    actual = compiler.compile(source)
+    try:
+        compiler = scss.Scss(scss_opts=dict(style='expanded'), search_paths=[include_dir, directory])
+        actual = compiler.compile(source)
+
+        getattr(mod, 'tearDown', lambda:None)()
+
+        # Normalize leading and trailing newlines
+        actual = actual.strip('\n')
+        expected = expected.strip('\n')
 
-    # Normalize leading and trailing newlines
-    actual = actual.strip('\n')
-    expected = expected.strip('\n')
+        assert expected == actual
 
-    assert expected == actual
+    finally:
+        # cleanup generated assets if any
+        assets_dir = os.path.join(directory, 'static', 'assets')
+        if os.path.isdir(assets_dir):
+            for x in os.listdir(assets_dir):
+                if x != '.placeholder':
+                    os.remove(os.path.join(assets_dir, x))
diff --git a/scss/types.py b/scss/types.py
index f310a1cd..57c42990 100644
--- a/scss/types.py
+++ b/scss/types.py
@@ -275,6 +275,13 @@ def __repr__(self):
     def __hash__(self):
         return hash((self.value, self.unit_numer, self.unit_denom))
 
+    def __bool__(self):
+        return bool(self.value)
+
+    def __nonzero__(self):
+        # Py 2's name for __bool__
+        return self.__bool__()
+
     def __int__(self):
         return int(self.value)
 
diff --git a/scss/util.py b/scss/util.py
index 481a0c0c..063239bd 100644
--- a/scss/util.py
+++ b/scss/util.py
@@ -160,17 +160,17 @@ def wrapper(*args, **kwargs):
             profiler.disable()
             stats = pstats.Stats(profiler, stream=stream)
             stats.sort_stats('time')
-            print >>stream, ""
-            print >>stream, "=" * 100
-            print >>stream, "Stats:"
+            print >> stream, ""
+            print >> stream, "=" * 100
+            print >> stream, "Stats:"
             stats.print_stats()
-            print >>stream, "=" * 100
-            print >>stream, "Callers:"
+            print >> stream, "=" * 100
+            print >> stream, "Callers:"
             stats.print_callers()
-            print >>stream, "=" * 100
-            print >>stream, "Callees:"
+            print >> stream, "=" * 100
+            print >> stream, "Callees:"
             stats.print_callees()
-            print >>sys.stderr, stream.getvalue()
+            print >> sys.stderr, stream.getvalue()
             stream.close()
         return res
     return wrapper
diff --git a/tox.ini b/tox.ini
index ca9ec35c..2331ac5f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,6 +18,7 @@ commands = {toxworkdir}/{envname}/Scripts/py.test []
 deps =
     {[testenv]deps}
     enum34
+    importlib
 
 [testenv:py27]
 deps =