design-themes/theme_artists/views/snippets/s_parallax.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>

<template id="s_parallax" inherit_id="website.s_parallax">
    <!-- Section -->
    <xpath expr="//section" position="attributes">
        <attribute name="data-oe-shape-data">{"shape":"web_editor/Airy/12_001","flip":["y"]}</attribute>
    </xpath>
    <!-- Bg Image -->
    <xpath expr="//span[hasclass('s_parallax_bg')]" position="replace">
        <span class="s_parallax_bg oe_img_bg" style="background-image: url('/web/image/website.s_cover_default_image'); background-position: 50% 75%;"/>
    </xpath>
    <!-- Shape -->
    <xpath expr="//section/*[last()]" position="before">
        <div class="o_we_shape o_web_editor_Airy_12_001" style="background-image: url('/web_editor/shape/web_editor/Airy/12_001.svg?c1=o-color-1&amp;c3=o-color-5&amp;flip=y'); background-position: 50% 100%;"/>
    </xpath>
</template>

</odoo>