message: no overly conservative inside box test
diff: @@ -48,14 +48,9 @@ unmasked void Volume_intersect_kernel(
  box3f *uniform box = &self->boundingBox;
  - bool insideBox = (ray->org.x > box->lower.x && ray->org.x <= box->upper.x)
  - && (ray->org.y > box->lower.y && ray->org.y <= box->upper.y)
  - && (ray->org.z > box->lower.z && ray->org.z <= box->upper.z);
  -
  vec2f t;
  intersectBox(ray->org, ray->dir, *box, t.x, t.y);
  - const bool hit = insideBox || (t.x < t.y && ((t.x > ray->t0 && t.x < ray->t) ||
  - (t.y > ray->t0 && t.y < ray->t)));
  + const bool hit = t.x < t.y && (t.x < ray->t && t.y > ray->t0);
  if (hit) {
  ray->instID = args->context->instID[0];
  