What's the easiest way to create empty view in Odoo, which renders custom HTML?
There are no such type of views in advanced views
To do it with your specifications, add HTML code in sheet
tag:
<record model="ir.ui.view" id="session_form_view">
<field name="name">session.form</field>
<field name="model">openacademy.session</field>
<field name="arch" type="xml">
<form string="Session Form">
<sheet>
Your HTML code here
</sheet>
</form>
</field>
</record>