Hi @simmania,
Yes, that dt value will reflect the time it took to render the last frame, so if your main thread is to lag and take longer, it will reflect that.
You shouldn’t be targeting 16ms as the norm, since on high refresh rate monitors like gaming monitors that number can be lower (half on 120Hz, even less on 240Hz).
If you are talking of putting a max cap on that, then there is a way, check here: [SOLVED] Any way to cap game at 30fps?