ZDoom

Either or will do the trick. As long as there's some 'visible' difference between the sectors on either side of the line.

[quote="Zippy"][quote="esselfortium"]But is it correct behavior for deep water not to clip midtextures?[/quote]In vanilla, doesn't only a sector height change clip midtextures?[/quote]
A [i]light[/i] level change clips midtextures, to be more exact.

Looks like it.

..and it correctly clips sprites in deep water, but not midtex? o_O

Yes, and Boom apparently never changed this when deep water came into play.

[quote="esselfortium"]But is it correct behavior for deep water not to clip midtextures?[/quote]In vanilla, doesn't only a sector height change clip midtextures? E.g. placing too tall a mixtexture on a non-height changing sector border causes the texture to be drawn into the floor/ceiling, right?

As I said, PrBoom shows the same behavior as ZDoom so I guess Boom did not implement it.

But is it correct behavior for deep water not to clip midtextures?

[quote="Graf Zahl"]
PrBoom shows them exactly like ZDoom.[/quote]

Case in point:

[img]http://img607.imageshack.us/img607/4338/prboom00.png[/img]

Indeed. SMMU changed middle-area colormaps to act just like ZDoom coloured light, not encompass the whole screen when you enter the place, thereby creating horrible discrepancies with maps where you're supposed to enter a special chamber to modify your visibility over a dark area => effect is destroyed in SMMU and beyond.

All of these are Eternity problems. (And yes, I have known for quite some time that Eternity's support for some Boom rendering tricks is a bit broken thanks to some badly motivated changes in SMMU.)

PrBoom shows them exactly like ZDoom.

Playing [url=http://www.doomworld.com/idgames/index.php?id=9461]Boomedit[/url] with ZDoom (or GZDoom) shows several discrepancies, the most severe of which being how colormaps are handled. The [url=http://img828.imageshack.us/g/screenshotdoom201101191.png/]following screenshots[/url] use Eternity as the Boom reference.

ZDoom applies Boom colormaps to the entire geometry, but not (as much) to sprites.
[url=http://img233.imageshack.us/i/screenshotdoom201101191.png/][img]http://img233.imageshack.us/img233/6651/screenshotdoom201101191.th.png[/img][/url] [url=http://img717.imageshack.us/i/screenshotdoom201101191.png/][img]http://img717.imageshack.us/img717/6651/screenshotdoom201101191.th.png[/img][/url] [url=http://img222.imageshack.us/i/screenshotdoom201101191.png/][img]http://img222.imageshack.us/img222/6651/screenshotdoom201101191.th.png[/img][/url] [url=http://img218.imageshack.us/i/screenshotdoom201101191.png/][img]http://img218.imageshack.us/img218/6651/screenshotdoom201101191.th.png[/img][/url]
What Eternity gives in the same room is obviously what was intended.
[url=http://img809.imageshack.us/i/etrn04.png/][img]http://img809.imageshack.us/img809/7619/etrn04.th.png[/img][/url] [url=http://img826.imageshack.us/i/etrn05.png/][img]http://img826.imageshack.us/img826/640/etrn05.th.png[/img][/url] [url=http://img207.imageshack.us/i/etrn06.png/][img]http://img207.imageshack.us/img207/8711/etrn06.th.png[/img][/url] [url=http://img25.imageshack.us/i/etrn07.png/][img]http://img25.imageshack.us/img25/1908/etrn07.th.png[/img][/url]

Less important than the colormaps, but noticeable nonetheless, is what happens in the deep water pool:

With ZDoom, you can see the middle texture through the deep water here:
[url=http://img828.imageshack.us/i/screenshotdoom201101191.png/][img]http://img828.imageshack.us/img828/6651/screenshotdoom201101191.th.png[/img][/url]
When you shouldn't:
[url=http://img84.imageshack.us/i/etrn12.png/][img]http://img84.imageshack.us/img84/6287/etrn12.th.png[/img][/url]

However, it is not fullbright when seen from the deep water itself:
[url=http://img413.imageshack.us/i/screenshotdoom201101191.png/][img]http://img413.imageshack.us/img413/6651/screenshotdoom201101191.th.png[/img][/url]
When it should:
[url=http://img37.imageshack.us/i/etrn01.png/][img]http://img37.imageshack.us/img37/7242/etrn01.th.png[/img][/url] [url=http://img405.imageshack.us/i/etrn10.png/][img]http://img405.imageshack.us/img405/944/etrn10.th.png[/img][/url]