How do I align floor textures in vanilla format?

[Dweller Dark]

I know how to do it using the UDMF format, but I don't know how or if it can be done in vanilla. For example, I've tried to make a teleporter alcove room, but the floor texture for that always ends up not looking correct and it seems I'd have to put the alcove elsewhere for it to show up correctly.

[jaeden]

AFAIK You can't align flats in doom format.

[Edward850]

That's not a feature in vanilla Doom. You either need to make a new texture or move the floor.

[JadingTsunami]

Flats are textured on a fixed 64x64 grid in vanilla. There are no offsets.

 

You have to set your editor's grid to 64 units and align the textures that way.

[plums]

If you really need to "align" a flat in vanilla you can export the flat as a graphic, offset it however much you want, and import it back into your wad. Obviously not something you want to do very much of but sometimes it can be useful for a single teleporter or something.

 

In Boom and up, you can also use displacement scrollers to adjust flats by a certain amount at the start of your map. This is very fiddly but somewhat more flexible than creating a new flat. I can't seem to find an example wad at the moment but I know there are some.

[Dark Pulse]

As others have said, you don't, at least not in vanilla. Other formats (Hexen map format, Boom, etc.) have tricks you can use, but with Vanilla, everything is strictly aligned to the grid.