message: notes on sv renderer
diff: @@ -185,7 +185,7 @@ void SciVisRenderer_intersect(uniform SciVisRenderer *uniform renderer,
  // Reset geometry ray.
  // TODO WILL: Because the compute geom sample is now going
  // to set t to infinity, this ray is going to be sent off the back!
  - geometryRay.t0 = geometryRay.t + renderer->volumeEpsilon;
  + geometryRay.t0 = geometryRay.t + renderer->super.epsilon;
  geometryRay.t = tMax; //!< end of valid ray interval for traceRay()
  geometryRay.primID = -1;
  geometryRay.geomID = -1;
  @@ -193,6 +193,7 @@ void SciVisRenderer_intersect(uniform SciVisRenderer *uniform renderer,
  // Update ray offset for use with isosurface geometries based on current
  // volume (this value ignored elsewhere).
  + // Why is this done?
  geometryRay.time = volume ? -rayOffset * volume->samplingStep : 0.f;
  // Trace next geometry ray.
  