How to create specular surface in Mitsurba Renderer

Hello everybody,

I am trying to use the Mitsuba Renderer to see some results with the new Gradient Domain Path Tracer algorithm. I am building my own scene and this question might seem silly… but I don’t manage to create a mirroring surface! I am using an html file to build a cornell box, and according to the documentation there are many bsdf we can give to a surface through tags like:

<bsdf type="roughconductor">
	<string name="distribution" value="ggx"/>

many kind of complex surfaces are explained in the documentation… but I still don’t manage to achieve an ideal specular surface. Anyone who can help please?