scene_template.xml

<!-- Template for a lit scene in testrender -->
<World>
   <!-- The camera FOV is compensated for [-0.5, 0.5] screen coordinates,
        and matches a 45 degree FOV with [-1, 1] screen coordinates.
        FOV = atan(2 * tan(45 * PI/360)) * 360/PI = 79.27854 -->
   <Camera eye="0, 0, 3" dir="0, 0, -1" fov="79.27854" />

   <!-- Background environment map. -->
   <ShaderGroup>
      %environment_shader_parameter_overrides%
      shader envmap layer1;
   </ShaderGroup>
   <Background resolution="2048" />

   <!-- Background quad with raytype test. -->
   <ShaderGroup>
      color Cin %background_color%;
      %environment_shader_parameter_overrides%
      shader raytype_background layer1;
   </ShaderGroup>
   <Quad corner="-340, -340, -800" edge_x="680, 0, 0" edge_y="0, 680, 0" />

   <!-- Shader graph for routing to output layer:
   input_shader_parameter_overrides : are parameter overrides for the input shader
   %input_shader_type% : type of an input shader to feed into the output shader.
   %input_shader_output% : name of output argument on input shader.
   %output_shader_type%: type of the output shader used to render with
   %output_shader_input% : name of input argument on output shader.
   -->
   <ShaderGroup>
      %input_shader_parameter_overrides%;
      shader %input_shader_type% inputShader;
      shader %output_shader_type% outputShader;
      connect inputShader.%input_shader_output% outputShader.%output_shader_input%;
   </ShaderGroup>

   <Sphere center="0, 0, 0" radius="1" />
</World>