gzdoom: A window without rendering behind it. and mirror.

[doomexpert]

is it possible to make a wall so you can see trough it without the engine renders behind it?

and is it possible to make a window that is not attachted to the ceiling? cause with mirrors its need to be a sector with the same floor and ceiling height..

[Kappes Buur]

is it possible to make a wall so you can see trough it ...

Yes, of course.
The easiest approach would be to set the linedef to translucent.

without the engine renders behind it?

No,
If nothing is rendered then it is a void.

and is it possible to make a window that is not attachted to the ceiling?

Yes, of course.

cause with mirrors its need to be a sector with the same floor and ceiling height..

No, mirrors are not like doors where the ceiling is at the same height as the floor.

[doomexpert]

is it possible to make a wall so you can see trough it ...

Yes, of course.
The easiest approach would be to set the linedef to translucent.

without the engine renders behind it?

No,
If nothing is rendered then it is a void.

Hey i tested everything, only 1 thing worked was to give the floor and ceiling the same heigt and no texture. then i can look behind it. but did what you said, translucent line(208) but the wall doesnt get translucent... the wall (a closed sector) has the same floor and ceiling height with a texture. Do i have to create a dummy sector for this? if so, then the engine would render behint it. i want just make a simple window, not rendering behind it, not breakable, so monsters dont wake up behind the window. but you can see trough. thats what i want.

[Kappes Buur]

Sorry, we probably are talking at cross-purposes.
Could you supply a map, which would be the best option, or perhaps a detailed drawing/screenshot of what you want to do.