Came across these photos that were going to form part of a magazine article. They show some Bubinga (African Satinwood if you want to be posh) with unfilled grain.
Here with some grain filler starting to be applied
(would have helped if I'd taken photos of the same area of timber )
and in a contrasting colour
If you look closely you can see that the grain filler has been dragged out in a few places. This next photo using a darker grain filler shows it better. Really got too enthusiastic with the wiping.