diff --git a/Packages/vcs/Lib/configurator.py b/Packages/vcs/Lib/configurator.py
index 1c92a021e1..9fbd42e597 100644
--- a/Packages/vcs/Lib/configurator.py
+++ b/Packages/vcs/Lib/configurator.py
@@ -546,7 +546,9 @@ def setup_animation(self):
             self.anim_button = anim_toolbar.add_toggle_button("Animation", on=self.start_animating, off=self.stop_animating, on_prefix="Run", off_prefix="Stop")
             anim_toolbar.add_button(["Step Forward"], action=self.step_forward)
             anim_toolbar.add_button(["Step Backward"], action=self.step_back)
-            anim_toolbar.add_slider_button(0, 0, self.canvas.animate.number_of_frames(), "Time Slider", update=self.set_animation_frame, end=self.final_animation_frame)
+            def get_frame():
+                return self.canvas.animate.frame_num
+            anim_toolbar.add_slider_button(get_frame, 0, self.canvas.animate.number_of_frames(), "Time Slider", update=self.set_animation_frame)
             anim_toolbar.add_slider_button(self.animation_speed, 1, 30, "Frames Per Second", update=self.set_animation_speed)
             self.save_anim_button = anim_toolbar.add_button(["Save Animation", "Cancel Save"], action=self.save_animation_press)
             self.initialized = True
@@ -641,11 +643,8 @@ def stop_animating(self):
 
     def set_animation_frame(self, value):
         value = int(value)
-        self.canvas.animate.draw_frame(value)
+        self.canvas.animate.draw_frame(value, allow_static=False, render_offscreen=False)
         return value
-    def final_animation_frame(self, value):
-        value = int(value)
-        self.canvas.animate.draw_frame(value, allow_static = False, render_offscreen = False)
 
     def set_background_red(self, value):
         _, g, b = self.canvas.backgroundcolor
diff --git a/Packages/vcs/Lib/vtk_ui/slider.py b/Packages/vcs/Lib/vtk_ui/slider.py
index 8c6f90a39a..4e746b35e9 100644
--- a/Packages/vcs/Lib/vtk_ui/slider.py
+++ b/Packages/vcs/Lib/vtk_ui/slider.py
@@ -35,7 +35,12 @@ def __init__(self, interactor, value=0, min_val=0, max_val=1, point1=(0,.1), poi
 
         self.repr.SetMinimumValue(float(min_val))
         self.repr.SetMaximumValue(float(max_val))
-        self.repr.SetValue(float(value))
+        if callable(value):
+            self.repr.SetValue(float(value()))
+            self.value_func = value
+        else:
+            self.repr.SetValue(float(value))
+            self.value_func = None
 
         self.repr.SetSliderLength(0.05)
         self.repr.SetSliderWidth(0.02)
@@ -58,6 +63,8 @@ def place(self):
         self.repr.GetPoint2Coordinate().SetValue((self.x2, self.y2, 0))
 
     def show(self):
+        if self.value_func:
+            self.repr.SetValue(float(self.value_func()))
         self.widget.EnabledOn()
         self.widget.On()