I added a few candles from one of the Marketplace assets into my scene, completely enclosed inside a building. I used FREEZERENDERING cmd to make sure stuff gets culled (in the Editor and on the device) and stuff does get culled - I didn’t see anything inside the building, not particles, not geometry.
However, fps was horrible on the device as if those particles were rendered in front of the camera. They are expensive (I ran shader complexity and it was red on the particles), don’t get me wrong, but I expected for them to be culled and only drop performance down when I entered the building.
Is it a bug?
P.S. Those are GPU particles and I am using UE 4.14.1