message: Generate pfm image file when framebuffer is in float format.
diff: @@ -69,6 +69,9 @@ namespace ospray {
  if (!imageOutputFile.empty()) {
  auto fb = root->child("frameBuffer").nodeAs<sg::FrameBuffer>();
  auto *srcPB = (const uint32_t *)fb->map();
  + if (fb->format() == OSP_FB_RGBA32F)
  + utility::writePFM(imageOutputFile + ".pfm", width, height, (vec4f*)srcPB);
  + else
  utility::writePPM(imageOutputFile + ".ppm", width, height, srcPB);
  fb->unmap(srcPB);
  }
  