diff --git a/src/aperture/apertureTexture.m b/src/aperture/apertureTexture.m
index e541abc..49086ee 100644
--- a/src/aperture/apertureTexture.m
+++ b/src/aperture/apertureTexture.m
@@ -10,128 +10,29 @@
             cfg = apertureInit(cfg);
 
             cfg.aperture.texture = Screen('MakeTexture', cfg.screen.win, ...
-                cfg.color.background(1) * ones(cfg.screen.winRect([4 3])));
+                cfg.color.background(1) * ones(cfg.screen.winRect([3 3])));
 
         case 'make'
 
-            TRANSPARENT = [0, 0, 0, 0];
+            cfg = apertureTextureMake(cfg, thisEvent);
 
-            xCenter = cfg.screen.center(1);
-            yCenter = cfg.screen.center(2);
-
-            switch cfg.aperture.type
-
-                case 'none'
-
-                    Screen('Fillrect', cfg.aperture.texture, TRANSPARENT);
-
-                case 'circle'
-
-                    diameter = cfg.aperture.widthPix;
-
-                    if isfield(cfg.aperture, 'xPosPix')
-                        xCenter = cfg.screen.center(1) + cfg.aperture.xPosPix;
-                    end
-                    if isfield(cfg.aperture, 'yPosPix')
-                        yCenter = cfg.screen.center(2) + cfg.aperture.yPosPix;
-                    end
-
-                    Screen('FillOval', cfg.aperture.texture, TRANSPARENT, ...
-                        CenterRectOnPoint([0, 0, repmat(diameter, 1, 2)], ...
-                        xCenter, yCenter));
-
-                case 'ring'
-
-                    % expansion speed is log over eccentricity
-                    [cfg] = eccenLogSpeed(cfg, thisEvent.time);
-
-                    Screen('Fillrect', cfg.aperture.texture, cfg.color.background);
-
-                    Screen('FillOval', cfg.aperture.texture, TRANSPARENT, ...
-                        CenterRectOnPoint( ...
-                        [0, 0, repmat(cfg.ring.outerRimPix, 1, 2)], ...
-                        xCenter, yCenter));
-
-                    Screen('FillOval', cfg.aperture.texture, [cfg.color.background 255], ...
-                        CenterRectOnPoint( ...
-                        [0, 0, repmat(cfg.ring.innerRimPix, 1, 2)], ...
-                        xCenter, yCenter));
-
-                case 'wedge'
-
-                    cycleDuration = cfg.mri.repetitionTime * cfg.volsPerCycle;
-
-                    % Update angle for rotation of background and for apperture for wedge
-                    switch cfg.direction
-
-                        case '+'
-                            thisEvent.angle = 90 - ...
-                                cfg.aperture.width / 2 + ...
-                                (thisEvent.time / cycleDuration) * 360;
-                        case '-'
-                            thisEvent.angle = 90 - ...
-                                cfg.aperture.width / 2 - ...
-                                (thisEvent.time / cycleDuration) * 360;
-
-                    end
-
-                    Screen('Fillrect', cfg.aperture.texture, cfg.color.background);
-
-                    Screen('FillArc', cfg.aperture.texture, TRANSPARENT, ...
-                        CenterRect( ...
-                        [0, 0, repmat(cfg.stimRect(4), 1, 2)], ...
-                        cfg.screen.winRect), ...
-                        thisEvent.angle, ... % start angle
-                        cfg.aperture.width); % arc angle
-
-                case 'bar'
-
-                    % aperture is the color of the background
-                    Screen('FillRect', cfg.aperture.texture, cfg.color.background);
-
-                    % We let the stimulus through
-                    Screen('FillOval', cfg.aperture.texture, TRANSPARENT, ...
-                        CenterRect([0, 0, repmat(cfg.stimRect(3), 1, 2)], cfg.screen.winRect));
-
-                    % Then we add the position of the bar aperture
-
-                    % which one is the right and which one is the left??
-
-                    Screen('FillRect', cfg.aperture.texture, cfg.color.background, ...
-                        [0, ...
-                        0, ...
-                        thisEvent.barPosPix - cfg.aperture.barWidthPix / 2, ...
-                        cfg.screen.winRect(4)]);
-
-                    Screen('FillRect', cfg.aperture.texture, cfg.color.background, ...
-                        [thisEvent.barPosPix + cfg.aperture.barWidthPix / 2, ...
-                        0, ...
-                        cfg.screen.winRect(3), ...
-                        cfg.screen.winRect(4)]);
-
-                otherwise
-
-                    error('unknown aperture type: %s.', cfg.aperture.type);
+        case 'draw'
 
+            scalingFactor = 1;
+            if isfield(cfg, 'scalingFactor') && ~isempty(cfg.scalingFactor)
+                scalingFactor = cfg.scalingFactor;
             end
 
-        case 'draw'
-
+            rotationAngle = [];
             if strcmp(cfg.aperture.type, 'bar')
-
-                % Draw aperture and we rotate to match the required condition
-                Screen('DrawTexture', cfg.screen.win, cfg.aperture.texture, ...
-                    cfg.screen.winRect, ...
-                    CenterRect( ...
-                    cfg.screen.winRect, ...
-                    cfg.screen.winRect), ...
-                    thisEvent.condition - 90);
-            else
-
-                Screen('DrawTexture', cfg.screen.win, cfg.aperture.texture);
-
+                rotationAngle = thisEvent.condition - 90;
             end
 
+            Screen('DrawTexture', cfg.screen.win, cfg.aperture.texture, ...
+                cfg.screen.winRect, ...
+                CenterRect(cfg.screen.winRect * scalingFactor, cfg.screen.winRect), ...
+                rotationAngle);
+
     end
 
 end
@@ -188,3 +89,110 @@
     end
 
 end
+
+function cfg = apertureTextureMake(cfg, thisEvent)
+
+    TRANSPARENT = [0, 0, 0, 0];
+
+    xCenter = cfg.screen.center(1);
+    yCenter = cfg.screen.center(2);
+
+    switch cfg.aperture.type
+
+        case 'none'
+
+            Screen('Fillrect', cfg.aperture.texture, TRANSPARENT);
+
+        case 'circle'
+
+            diameter = cfg.aperture.widthPix;
+
+            if isfield(cfg.aperture, 'xPosPix')
+                xCenter = xCenter + cfg.aperture.xPosPix;
+            end
+            if isfield(cfg.aperture, 'yPosPix')
+                yCenter = yCenter + cfg.aperture.yPosPix;
+            end
+
+            Screen('FillOval', cfg.aperture.texture, TRANSPARENT, ...
+                CenterRectOnPoint([0, 0, repmat(diameter, 1, 2)], ...
+                xCenter, yCenter));
+
+        case 'ring'
+
+            % expansion speed is log over eccentricity
+            [cfg] = eccenLogSpeed(cfg, thisEvent.time);
+
+            Screen('Fillrect', cfg.aperture.texture, cfg.color.background);
+
+            Screen('FillOval', cfg.aperture.texture, TRANSPARENT, ...
+                CenterRectOnPoint( ...
+                [0, 0, repmat(cfg.ring.outerRimPix, 1, 2)], ...
+                xCenter, yCenter));
+
+            Screen('FillOval', cfg.aperture.texture, [cfg.color.background 255], ...
+                CenterRectOnPoint( ...
+                [0, 0, repmat(cfg.ring.innerRimPix, 1, 2)], ...
+                xCenter, yCenter));
+
+        case 'wedge'
+
+            cycleDuration = cfg.mri.repetitionTime * cfg.volsPerCycle;
+
+            % Update angle for rotation of background and for apperture for wedge
+            switch cfg.direction
+
+                case '+'
+                    thisEvent.angle = 90 - ...
+                        cfg.aperture.width / 2 + ...
+                        (thisEvent.time / cycleDuration) * 360;
+                case '-'
+                    thisEvent.angle = 90 - ...
+                        cfg.aperture.width / 2 - ...
+                        (thisEvent.time / cycleDuration) * 360;
+
+            end
+
+            Screen('Fillrect', cfg.aperture.texture, cfg.color.background);
+
+            Screen('FillArc', cfg.aperture.texture, TRANSPARENT, ...
+                CenterRect( ...
+                cfg.destinationRect, ...
+                cfg.screen.winRect), ...
+                thisEvent.angle, ... % start angle
+                cfg.aperture.width); % arc angle
+
+        case 'bar'
+
+            % aperture is the color of the background
+            Screen('FillRect', cfg.aperture.texture, cfg.color.background);
+
+            % We let the stimulus through
+            Screen('FillOval', cfg.aperture.texture, TRANSPARENT, ...
+                CenterRect( ...
+                [0, 0, repmat(cfg.screen.winRect(4), 1, 2)], ...
+                cfg.screen.winRect));
+
+            % Then we add the position of the bar aperture
+
+            % which one is the right and which one is the left??
+
+            Screen('FillRect', cfg.aperture.texture, cfg.color.background, ...
+                [0, ...
+                0, ...
+                thisEvent.barPosPix - cfg.aperture.barWidthPix / 2, ...
+                cfg.screen.winRect(4)]);
+
+            Screen('FillRect', cfg.aperture.texture, cfg.color.background, ...
+                [thisEvent.barPosPix + cfg.aperture.barWidthPix / 2, ...
+                0, ...
+                cfg.screen.winRect(3), ...
+                cfg.screen.winRect(4)]);
+
+        otherwise
+
+            error('unknown aperture type: %s.', cfg.aperture.type);
+
+    end
+
+end
diff --git a/src/initPTB.m b/src/initPTB.m
index 6e669a8..fc38635 100644
--- a/src/initPTB.m
+++ b/src/initPTB.m
@@ -35,6 +35,8 @@
 
     cfg = setDefaultsPTB(cfg);
 
+    Screen('Preference', 'SkipSyncTests', cfg.skipSyncTests);
+
     initKeyboard;
     initDebug(cfg);
 
@@ -120,10 +122,11 @@
 function initDebug(cfg)
 
     % init PTB with different options in concordance to the debug Parameters
-    Screen('Preference', 'SkipSyncTests', 0);
+
     if cfg.debug.do
 
-        Screen('Preference', 'SkipSyncTests', 2);
+        cfg.skipSyncTests = 2;
+        Screen('Preference', 'SkipSyncTests', cfg.skipSyncTests);
         Screen('Preference', 'Verbosity', 0);
         Screen('Preference', 'SuppressAllWarnings', 1);
 
diff --git a/src/utils/setDefaultsPTB.m b/src/utils/setDefaultsPTB.m
index 66b1460..856f8f9 100644
--- a/src/utils/setDefaultsPTB.m
+++ b/src/utils/setDefaultsPTB.m
@@ -10,6 +10,8 @@
     %% list the default values
     fieldsToSet.testingDevice = 'pc';
 
+    fieldsToSet.skipSyncTests = 0;
+
     % keyboard defaults
     fieldsToSet.keyboard.keyboard = [];
     fieldsToSet.keyboard.responseBox = [];
diff --git a/tests/test_setDefaultsPTB.m b/tests/test_setDefaultsPTB.m
index b7aefc3..ae61b66 100644
--- a/tests/test_setDefaultsPTB.m
+++ b/tests/test_setDefaultsPTB.m
@@ -70,6 +70,8 @@ function test_setDefaultsPtbAudio()
     expectedCFG.screen.monitorDistance = 134;
     expectedCFG.screen.resolution = {[], [], []};
 
+    expectedCFG.skipSyncTests = 0;
+
     % fixation cross or dot
     expectedCFG.fixation.type = 'cross';
     expectedCFG.fixation.xDisplacement = 0;