How to define face dependent area emitter properties in mesh?

[hypevisenj]

Hello,

I want to model the appearance of an object that has blackbody emission with a non uniform temperature distribution where each mesh face has a temperature value

One possibility is to define an area emitter for each face in the mesh, but is there a better way to do this that is more concise?

[Speierers]

Hi @hypevisenj ,

You should be able to combine mesh-attribute textures and area light like this:

<shape type="ply">
  <string name="filename" value="my_mesh_with_face_color_attr.ply"/>
    <emitter type="area">
      <texture type="mesh_attribute" name="radiance">
        <string name="name" value="face_color"/>
      </texture>
   </emitter>
</shape>

Please let me know if that works for you.