Hi Kees,
You have managed to turn off the 'Vectorial Hatching' option off in the 'On Screen Display Options'.
So you are actually seeing the bitmap image of the fill.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11