I don't think the answer I got for this question was what I was expecting, so I decided to test it myself !!
Why? Because I think the answer to this question can be very useful for hunting, when deciding where the EK should stand, where the Druid should stand, etc... because depending on the SQM, there WILL be an effect on the upcoming waves!!
I have tested every possibility (8), here are all of them:
1-2) Wave in NORTH direction:
3-4) Wave in SOUTH direction:
5-6) Wave in EAST direction:
7-8) Wave in WEST direction:
Conclusion:
- If you are waving horizontally, stay away from the north wall, it will cut your wave!
- If you are waving vertically, stay away from western wall, it will cut your wave!
With this, mages/ek can decide better where to stand, in a way that the wave will hit every creature around the ek =)
EDIT: In order for walls to have an effect in your waves, you need to be AT LEAST on the 2nd SQM of the corridor OR deeper. If you are on the 1st SQM (exactly where corridor begins) there won't be any effect on your wave.