Your func_water also needs a key/value pair of [ wait = -1 ] IF you trigger the water to drain versus just killing it. Otherwise it will return to it's original position.

Two things to note, since this is now an entity it will not take your r_wateralpha settings. You can add an alpha key to it though.

Secondly, I know you are using slime but the players view if under the surface(water, slime, lava) will not show the surface textured.

There's a docs folder in the download, explains it all. As well as example maps.

Footsteps are on by default. 

Secondly, I know you are using slime but the players view if under the surface(water, slime, lava) will not show the surface textured.
This is an easy fix in qbsp, actually I just added an entity key for it (_mirrorinside 1). 

home of the pox extras mod: http://quake.chaoticbox.com/ 

In the example water.map both transparency and inside surface texturing works just fine, grrrr :( 

The docs at the top of extras_water.qc mention that some qbsp's had func_water support (eQBSP v1.0b for MacOS) and would keep the inside faces, so I imagine the example map was compiled with that 

ericw continues to be awesome. 

Lots to look into there, I could be a while trying to understand it all, but it seems like you know what I'm trying to do and it could be the answer. I did get a draining effect when I was trying various things, I used func_door to lower the level of the slime, looked great but it was still a solid. 

extras r4 will be included in my uber mod. 

That works brilliantly. I couldn't get anywhere with JACK, couldn't find how to add extras to trenchbroom so persevered with Quark and it finally all fell into place. The drains now drain. Thanks very much for your help.

However... If I compile the map in Quark it plays perfectly well, but once I move it to it's own folder in /Quake/ it fails immediately with error AllocBlock Full. Progs.dat is also in this folder

Also when playing the map after compiling in Quark, it won't reload a saved game and fails with a list of items and values and a host_error:pr_executeprogram null function any ideas. I recompiled an earlier map in Quark now it has the link to progs.dat and that too won't load a saved file. 

If I compile the map in Quark it plays perfectly well, but once I move it to it's own folder in /Quake/ it fails immediately with error AllocBlock Full.
"AllocBlock Full" means the map exceeds the engine's limit for lightmapped faces. If you only get the error when launching quake directly, and not via quark, it sounds like you are using different engines?

Hmm, I can reproduce the error when loading a save with the extras r4 mod (at least the water.bsp sample map) in winquake, quakespasm, darkplaces. It seems like a bug in the mod :-( 

The small map I created also fails to reload a save.

The mod was inconsistent across various engines I tested. I think I'd just create a new progs with the features I like. 

""AllocBlock Full" means the map exceeds the engine's limit for lightmapped faces. If you only get the error when launching quake directly, and not via quark, it sounds like you are using different engines?"

It must have been something I was doing, today the map loads OK in /Quake/maps, /Quake/tmpQuark and /Quake/scel (it's own folder) all using quakespasm-spike-admod.exe 

"The mod was inconsistent across various engines I tested. I think I'd just create a new progs with the features I like. "

That's beyond my abilities I'm afraid. I'll have to wait for the bugfix. 

I'm not a QC programmer but I did make a new progs using the clean106 QC source and the bits of extras_r4 that includes moving water, ladders and footstep sounds AND saves/reloads correctly.

I ran both my test map and the water.bsp with no problems.

If you want to "test" it I'll upload it for you? 

Yes please, I'll give it a try. 

Create a new folder(directory) in your Quake folder. Ex: Quake\\extras_limited\\

Extract the zip file to your new folder, with directory structure intact.

So you should have:

Quake\\extras_limited\\progs.dat --- file
Quake\\extras_limited\\readme.txt --- file
Quake\\extras_limited\\progs\\ --- folder
Quake\\extras_limited\\sound\\ ---folder

Then create a maps folder:

Quake\\extras_limited\\maps\\

... and place your compiled map(.bsp) there.

Launch Quakespasm from your Quake directory and press the tilde " ~ " to bring down the console.

Type: game extras_limited
Type map <your map's name>

And... here you go:

http://www.quaketastic.com/files/misc/extrasr4_progs_modified.zip 

Please ignore the double backslashes that should be singles... it's a forum thang'! 

Brilliant, works perfectly. Thanks to everyone for their input and help on this one. 

All credit ofc goes to the original author, but I'm glad it worked for you. It's a really cool feature very rich on possibilities to.

Me thinks it should be standard in the mod big daddy's, Quoth and Arcane Dimensions :)

Especially now that ericw got the inside surfaces to show. 

to have an idea that would need this moving liquid feature, so thanks too. 

That kind of thinking may end up with some sort of all consuming collective mod...hmmm. 

I don't know of any über mod, is there one on the horizon hehe 

I hit the back button, refreshed and... BAM, there's the über mod! 

While the func_water is super cool, there is a really bad quirk(s) still.

Any "entity" in the water gets drawn in full view unless your r_wateralpha is 1(opaque, duh!)

I posted in the ericw tools thread about it not being "perspective correct" but today I now see it's just that the water texture doesn't get drawn on top of any entities surface. Which looks funky.

That means both point based(armor, health, etc) and brush based(doors, plats, etc) entities are affected.

Renderingwise, Darkplaces and FTE will draw the water surface on "top", but each of those have other issues.

In Darkplaces the ladders do not function at all and in FTE the water current will not let you swim against it.

Obviously, there are mapping work arounds.

TLDR
Make sure to test your setup with func_water in a small map before becoming heavily invested in it in your full map.