[SOLVED] Moving panel with info_placement_helper
Please check it and use the same idea 
That's very kind of you, thanks! However, I can't seem to open the file. It ends with .7z. What format is that?
.7z is a "self extracting zip file"... you should be able to open it by just double clicking... if not WinZip or WinRar should also also have the ability to open .7z files.
Or 7zip, the program officially used to make those....
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Many thanks for the assistance! It works now. Do you want to know what I did? I find this kind of funny, but after some testing and trying to make my moving panel similar to josepezdj's example, all I had to do was to move the func_door from the middle of the panel, to a corner. Isn't that kind of weird? Well, the info_placement_helper would then directly be at the panel AND the func_door, perhaps that was the problem. Thank again!
Yes it is. Could it be that your door was solid and therefore interrupting the movement? Check the door's flags and make sure you did tick these two: "Non-solid to player" and "Passable"
useful tools and stuff here on TWP 
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You might want to put the name of the func_brush forming the white panel in the "attach entity" parameter of the helper, when the door was in the center it probably decided that the non-portalable nodraw surface was the surface it was supposed to attach to, and therefore didn't apply to portals placed on the white surface.
[spoiler]- BEE2 Addons | (BEE2)
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Maps:
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I did try to put the name in the attach entity, but it didn't work. It works now though, thanks!
Yes it is. Could it be that your door was solid and therefore interrupting the movement? Check the door's flags and make sure you did tick these two: "Non-solid to player" and "Passable"
That might actually be it! I did tick those two but didn't think they were causing the problem.