A high value of gl_farclip will make it worse as it reduces your z-buffer precision; ideally setting it low will help more (there is, of course, a tradeoff in that).

z-fighting is really a mapping problem, and it should be fixed in the map and not by the engine.

The traditional "fix" (using polygon offset) sucks because (a) the z-buffer is non-linear so offset factors will have different effects at different depths, and (b) the OpenGL spec allows polygon offset to be implementation-dependent, so the same offset factor may have different effects on different hardware. 

I haven't requested this (yet) but with Peg's RMQ demo's it'd be very useful. There's lots, and the level length is 30 minutes average.

And yeah, z-fighting is bad level building. 

What are the engines that can play and rec demos with reloads and map changes except DP? 

well... technically all of them.

save a game
die somewhere
type disconnect
type record demo
load a game

same for level transitions.
change level
save
type disconnect
type record demo
load the game and continue playing

this is extremely helpful when sending in beta demos! :) 

yeah... this is extremely awkward, hence I'm looking for engines that can do it seamlessly 

Engine tutorial: Playback demos recorded across map changes. (Ridiculously easy).

http://forums.inside3d.com/viewtopic.php?t=2397 

I haven't requested this (yet) but with Peg's RMQ demo's it'd be very useful. There's lots, and the level length is 30 minutes average.

Oh, you've already had this available for years. cl_demospeed; set to negative numbers to rewind; it fucks with the motion blur though so you may wish to disable that. 

just added support for this to quakespasm:
http://quakespasm.svn.sourceforge.net/viewvc/quakespasm?view=revision&revision=604
... in the svn repo now, will be part of next version 

There's a way to fix demos recorded across map changes, but it only works for protocol 15 and 10002. With BJP's convdem tool, simply append a short newly recorded demo snipped to the end of the existing one (merge) and the post-mapchange recording will be shown fully. 

.. yes it does: tested with this one:
http://quakespasm.sf.net/tmp/tt2.dem 

That's a really useful feature, .exe please? 

here: http://quakespasm.sf.net/tmp/quakespasm_exe_r604.zip 

Works on map change and map restart(after death) but doesn't work on loading a save. 

Host_Loadgame_f() normally does a CL_Disconnect(), therefore loading a save stops the recording as very much expected. 

Same for me, "Host_EndGame: Server disconnected". 

as I said, that is the normal course of things, and also is out of the scope of the fix I applied which touches playback code and not recording code. you guys really want to record demos by loading saves while in the middle of recording?? that can be tricky, I guess. (have anyone else implemented such a thing?) 

I like doing that. Make sharing or recording playthroughs much easier if you just record and forget. 

DP has it, but it uses different format\protocol 

i.e. demo recording continues until an explicit "stop" command 

Is it possible to have a Quake 2 style invisibility in QuakeSpasm? Explanation: If you enable the notarget in Quake 2 and shoot a monster, the other monsters in range don't react. 

notarget behavior is controlled by the progs (QuakeC), not by the engine. 

Spirit has been patiently helping me out, but whenever I try to run the 'arcanum' user map from 'quaddicted', it just boots up the original Quake.

I have dragged the contents of the 'arcanum' zip into the 'drake290111' folder.
This, in turn is contained within a main folder called 'Quake', sitting on my desktop.
The 'Quakespasm' engine exec is inside this main folder as well.
As is the id1 folder.

I double click the exec and I am prompted to enter a command into the command line parameter box.
I was told to type this:

"-game drake290111+map arcstart -heapsize 128000"

Whenever enter this, it just takes me to the main quake screen. I begin play, and it is just the introduction, followed by the slipgate complex etc.

I'm trying hard to get this to work, can anyone help?

BR.

Baz. 

this was probably just a typo, but there should be a space between 'drake290111' and '+map' 

oh also, if you can load the game up and then, as soon as it's done loading, type 'condump'

there should be a condump.txt file in your /quake/ folder. check to see if there are any errors down near the bottom you might have missed, or, if worst comes to worst, maybe post the last 20-30 lines here. 

oops sorry, there should be a condump.txt file in your /quake/drake290111/ folder. :P