3d floors & outside fog border

[LilWhiteMouse]

Are there any issues I should know about concerning outside fog and 3d floors? I created my structure in a work space area, and everything rendered fine. When I copy it over to where I want, I'm getting an almost texture popping/shimmer like effect.
Work area version:

Placed version (retextured):

Any other possible nuance concerning 3d floors that would cause this?
[EDIT] Another view.

[Blue Shadow]

You've got overlapping 3d floors there if I'm not mistaken.

[LilWhiteMouse]

You've got overlapping 3d floors there if I'm not mistaken.

Perhaps I don't understand, but the only two control sectors that use the respective tag occupy different Z spaces.
I cut out the offending area if anyone would be so kind to tell me specifically what I'm doing wrong:
http://www.prdarkfox.com/lwm/map03.7z

[Blue Shadow]

Yes, it turned out I was wrong. To me, It looked like an overlapping 3d floor issue, but in fact it wasn't.

Unfortunately, I couldn't figure out the problem.

Edit: I'm tempted to say that's a GZDoom bug, but I was already wrong in my diagnostic of this issue so I could as well be wrong with this one too.

If you apply fog on the sector that has the 3d floor ('main' sector, not the control sector) and on all surrounding sectors, this issue no longer exist.

[Kappes Buur]

I'm not really sure what caused the shimmering effect, but usually, as Blue Shadow already mentioned, it is due to overlapping sectors.

I redrew the map a bit, maybe that will help.
http://files.drdteam.org/index.php/file ... b-map03.7z

[LilWhiteMouse]

I redrew the map a bit, maybe that will help.

Thanks for the effort, but that was the work space version, which works just fine. It's the other one that doesn't render properly.

I've noted that if you give yourself the powerlightamp powerup, the rendering glitch goes away. Or at the very least, it's no longer visible. The problem seems to be tied to the colored fog. I commented out the outsidefog property, and bumped the light level up to 128, and it renders properly.

[EDIT]

If you apply fog on the sector that has the 3d floor ('main' sector, not the control sector) and on all surrounding sectors, this issue no longer exist.

I applied Sector_SetFade() matching the outsidefog values to the outside window sector, and it makes the problem go away. I'd still like to know if this is a bug or user error though.