Changing height of fade for parallax CollapsingToolbarLayout

I'm trying to shorten my collapsing toolbar layout but when I change the height of the CollapsingToolBbarLayout to my desired new height (200dp) it, the image appears faded already on page load. I'm assuming there some way to set the height at which the image fades to go along with this but I just can't find anything helpful... thanks ahead of time

Here is the layout I'm using:

<android.support.design.widget.AppBarLayout
    android:id="@+id/htab_appbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?attr/colorPrimary"
    android:fitsSystemWindows="true"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/htab_collapse_toolbar"
        android:layout_width="match_parent"
        android:layout_height="256dp"
        android:fitsSystemWindows="true"
        app:contentScrim="?attr/colorPrimary"
        app:layout_scrollFlags="scroll|exitUntilCollapsed|snap">

        <ImageView
            android:id="@+id/htab_header"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/mountains"
            android:fitsSystemWindows="true"
            android:scaleType="centerCrop"
            app:layout_collapseMode="parallax" />

        <android.support.v7.widget.Toolbar
            android:id="@+id/htab_toolbar"
            android:layout_width="match_parent"
            android:layout_height="104dp"
            android:gravity="top"
            android:minHeight="?attr/actionBarSize"
            app:layout_collapseMode="pin"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
            app:titleMarginTop="13dp" />

        <android.support.design.widget.TabLayout
            android:id="@+id/htab_tabs"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:layout_gravity="bottom"
            app:tabIndicatorColor="@android:color/white" />

    </android.support.design.widget.CollapsingToolbarLayout>

</android.support.design.widget.AppBarLayout>

Code from tutorial: http://blog.grafixartist.com/parallax-scrolling-tabs-design-support-library/