How Does RedXVI Avoid the FOF Error?

[Eblo]

In other words, how does the GFZ1 RedXVI secret avoid the FOF top/bottom height error in RVZ1, while using MAP MAP16 causes a crash?

EDIT: Also, why is RVZ1 playable in the game but it's shown as an error in WAD editors?

 

[Scarbo the Black Sheep]

It decodes the "corrupt" data.

 

[Ice]

Huh? What FOF has those weird heights in it?

 

[Jellybones]

Eblo, I think it's because Red Volcano zone is stored in soar.dta.

 

[K.S.]

In other words, how does the GFZ1 RedXVI secret avoid the FOF top/bottom height error in RVZ1, while using MAP MAP16 causes a crash?

EDIT: Also, why is RVZ1 playable in the game but it's shown as an error in WAD editors?

I knew there'd be a time where I'd need to post this on here...
http://wiki.srb2.org/wiki/Talk:Red_Volcano_Zone_Act_1#RVZ1_information
Should explain everything. If there's something you don't understand still, feel free to ask me.

 

[Eblo]

In other words, how does the GFZ1 RedXVI secret avoid the FOF top/bottom height error in RVZ1, while using MAP MAP16 causes a crash?

EDIT: Also, why is RVZ1 playable in the game but it's shown as an error in WAD editors?

I knew there'd be a time where I'd need to post this on here...
http://wiki.srb2.org/wiki/Talk:Red_Volcano_Zone_Act_1#RVZ1_information
Should explain everything. If there's something you don't understand still, feel free to ask me.

Ah, that makes perfect sense. Question resolved.

 

[SSNTails]

Oh, and the inverse FOF error is unintentional, it's just so happened to work out that way reading scrambled data.