message: adding option for using backplate
diff: @@ -125,6 +125,8 @@ namespace ospray {
  backplate->data = malloc(sizeof(unsigned char) * backplate->size.y * stride);
  vec3f bgColor = child("bgColor").valueAs<vec3f>();
  memcpy(backplate->data, &bgColor.x, backplate->channels*backplate->depth);
  + createChild("useBackplate", "bool", true, NodeFlags::none, "use\
  + backplate for path tracer");
  }
  Renderer::~Renderer()
  @@ -277,6 +279,10 @@ namespace ospray {
  }
  }
  +
  + if (!child("useBackplate").valueAs<bool>())
  + ospSetObject(ospRenderer, "backplate", nullptr);
  +
  ospCommit(ospRenderer);
  frameMTime.renew();
  }
  