I started a new English campaign to try things out, on VH/VH with Tmodelsk Submod.
The family tree looks ok, no family members not appearing on the Family tree like it was the case with France and Aragon.
However, during the assault on Caerenavon, this happened: (It also happened in my French campaign during the siege on Gand, but didn't witness this during my Aragon campaign which I played for many turns)
This graphics glitch happens when units are fighting on the walls.
I remember witnessing something similar maybe once or twice playiog SS6.4 or DLV BB I don't remember.
When I zoom out of the walls where the glitch happened, it goes back to normal. It only appears when I approach the zone with the camera.
I have the graphics set on high for buildings, units (large size) and effects, while it is medium on grass and vegetation.
Could it be my graphics card?