3D floor and stacked sector demo maps?

[NerdKoopa]

Does anyone have good, clean demonstration maps for 3D floors and stacked sectors? The ZDoom wiki doesn't have a demo for 3D floors, and the link for stacktest.7z no longer works. The pages describing these functions are good and all, but I can't quite figure out how to use them. I need to see them in editor.

[Kappes Buur]

Possibly these may be of some help:

Building with 3D sloped roof
Kappes Buur's 3D_BLDG7e.WAD
sloped 3D control sectors must be aligned properly

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Building with multiple 3D floors
just a lot of control sectors
Kappes Buur's staircase3b2.wad

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Stacked Sectors
Tormentor's The Refinery
the control sectors match the outline of the map sectors

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[NerdKoopa]

Thanks! That was very helpful.