Splitface tile on wall with window by shower

[Kcoh]

Hi,

I’m going to have the attached tile on one of the walls which has window on, I’m worried that the ribbes in the tile will capture water and dirt if installed on the window reveal? Any thoughts on this? I have a fall on the bottom reveal/cill. Would installing the tiles with the ribbes perpendicular to the tiles on the cill mitigate this? Also on tile trim on window corners, what is the best way of installing them? On the wall face or reveal faces? See attached. Thanks

 

[Kcoh]

Example of trim on inside of window

 

[Kcoh]

My split face tile