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

<scene version="0.6.0">
	

	<bsdf type="multilayered" id="Material">
		<boolean name="bidir" value="true"/>
		<string name="pdf" value="const"/>
		<integer name="stochPdfDepth" value="4"/>
		<integer name="pdfRepetitive" value="1"/>
		<float name="diffusePdf" value="0.01"/>
		<boolean name="bidirUseAnalog" value="true"/>
		<float name="maxSurvivalProb" value="1"/>

		<integer name="nbLayers" value="3"/>


		<!-- surface s[0] -->
		<bsdf type="roughdielectric" name="surface_0">
			<float name="extIOR" value="1.0"/>
			<float name="intIOR" value="1.5"/>
			<float name="alpha" value="0.1"/>
		</bsdf>
		<texture type="bitmap" name="normal_tex_0">
			<string name="filename" value="xml/normal/topnormal.exr"/>
		</texture>

		<!-- medium m[0]-->
		<spectrum name="sigmaT_0" value="0.5"/>
		<spectrum name="albedo_0" value="0.5 0.7 0.95"/>
		<float name="g_0" value="-0.95"/>

		<!-- surface s[1]-->
		<bsdf type="roughdielectric" name="surface_1">
			<float name="extIOR" value="1.5"/>
			<float name="intIOR" value="1.2"/>
			<float name="alpha" value="0.01"/>
		</bsdf>
<!-- 		<texture type="bitmap" name="normal_1">
			<string name="filename" value="xml/normal/middlenormal.exr"/>
		</texture> -->

		<!-- medium m[1]-->
		<spectrum name="sigmaT_1" value="2"/>
		<spectrum name="albedo_1" value="0.5 0.95 0.5"/>
		<float name="g_1" value="0.85"/>

		<!-- surface s[2]-->
		<bsdf type="roughdielectric" name="surface_2">
			<float name="extIOR" value="1.5"/>
			<float name="intIOR" value="1.0"/>
			<float name="alpha" value="0.1"/>
			<!-- <string name="material" value="Au"/> -->
		</bsdf>		
		<texture type="bitmap" name="normal_tex_2">
			<string name="filename" value="xml/normal/bottomnormal.exr"/>
		</texture>		

	</bsdf>

	<shape type="rectangle">
		<transform name="toWorld">
			<scale x="1" y="1"/>
			<rotate x="1" angle="0"/>
			<translate x="0" y="0" z="0"/>
		</transform>
		<ref id="Material"/>
	</shape>


</scene>