"+WALLSPRITE" & "+FLATSPRITE" Questions

Hey.

I've got a few questions about the +WALLSPRITE and +FLATSPRITE flags, as you could probably tell.
I've found very little examples of them on the ZDoom Wiki (it doesn't even have a page for it) and a post on the forums from Kinsie about them being redundant(?) or something.

I'm making a map in a city and want to give it those little touches that Source games have (i.e decorative windows, fake doors, signs, graffiti, ETC)
I have a texture for the buildings but am having a hard time getting a real sense of scale and space with the details.
 thought something like: "Couldn't i just make these like decals and place them in the editor?", then my boyfriend told me about the +FLATSPRITE flag and I wanted to get some other, more experienced people's advice on it.

Would this even be a good idea and if not, is there some other way?
i know about the flat models workaround. shut up, i don't want to go through exporting 20 models.

As far as what I've used, a WALLSPRITE works like a sign, and you can use A_SetAngle so set which direction it faces (might be able to use the angle property in the editor too I guess). I've used FLATSPRITE to create a sprite that stays on the floor (in my case it was a shadow)

Just now, 7Soul said:

As far as what I've used, a WALLSPRITE works like a sign, and you can use A_SetAngle so set which direction it faces (might be able to use the angle property in the editor too I guess). I've used FLATSPRITE to create a sprite that stays on the floor (in my case it was a shadow)

ah i see, so you think i could make it like a decal?

I guess? But I can't think of a way to position it other than reducing the grid size to the minimum and manually placing it as close as possible to the wall

1 hour ago, 7Soul said:

I guess? But I can't think of a way to position it other than reducing the grid size to the minimum and manually placing it as close as possible to the wall

i mean, it works. whos gonna notice?

Flatsprites are easier to use than decals because you can see what they look like in the editor

I actually quite like the FLATSPRITE flag, It saves quite a lot on time AND resources, and you don't have to faff with DECALDEFS, however I'd imagine that to change the colour, you will have to use the colourize or tint (maybe colour remap, if it's from hexen or strife), to achieve the desired effect, I'm pretty sure WALLSPRITE is likewise and similar, but for walls.