Well that's the thing about mixing. In game we don't have any blatant "mixed" NPCs, so it's always seemed to me that if it happens, the child will look more like one parent or the other in terms of clan/race attributes. 
The cultural barriers would be the big ones separating the clans as much as the races. Keepers are nocturnal, Seekers are diurnal, for example, not to mention the different hierarchy in their tribes. Things like that.
Not to say that love doesn't conquer all though.
The cultural barriers would be the big ones separating the clans as much as the races. Keepers are nocturnal, Seekers are diurnal, for example, not to mention the different hierarchy in their tribes. Things like that. Not to say that love doesn't conquer all though.
