Controlling angle of portal
Make sure the angles of the info_placement_helper are parallel with the surface you are trying to force the placement on. If the wall is facing North, the helper needs to be facing North. If the face is tilted at a 45 degree angle along the Y axis, then the placement helper needs to be tilted at a 45 degree angle along the Y axis. Look at the axis gizmo, it will show you at a glance what direction it's facing at.
It worked perfectly on the floor. Now I want to orient the portal, so I set Use helper's angles to Yes, and it doesn't seem to work anymore. I can put portal anywhere in any direction. I also don't know, which axis represents the certain directions. I've tried out many cases but none of them helped.
Current setting: http://dl.dropbox.com/u/10487050/mcrst.JPG
What am I doing wrong?
Funny, I didn't try this, seems like I never thought of the big red arrow as a surface vector. Also, now I know, that the blue arrow points to the bottom of the portal.