It works now. 

I am unsure how to setup QuakeSpasm (or any Quake engine I guess) to run on a 144hz monitor.

Currently I am using vsync off with a host_maxfps of 144. I can't see any setting in Quakespasm to set a refresh rate of 144hz but it appears the monitor defaults to that already. Negke mentioned that changing host_maxfps might do weird things to the Quake physics so I'm wondering if there is another setting I need to change to set the max fps to 144 to get the benefit of the screen and no image tearing or input lag from vsync on. 

What monitor if I might ask? I've been wanting to get one of those 144hz 'lightboost' monitors. 

AFAIK the only controls you have in Quakespasm are host_maxfps, and vsync on/off. And negke is right, changing host_maxfps from 72 is probably a bad idea, physics goes nuts (you bounce on lifts, for one). So without messing up physics, currently you're stuck at 72fps.

There is some stuff on inside3d about doing framerate independent physics, IIRC, MH implemented it in RMQEngine and maybe DirectQ. So maybe we could implement that in a future QS release.

How does the default host_maxfps 72 look, with vsync on and off? 

vid_refreshrate doesn't exist anymore? Is it because SDL doesn't support it? 

There's no vid_refreshrate in QS, it looks like SDL1 didn't support specifying a refresh rate.

SDL2 does support asking for a specific refresh rate, so we could probably add it back in.

I'm not sure what the current behaviour is actually, suppose your desktop resolution is 1920x1080 @ 144Hz, and you launch QS in fullscreen mode at 1920x1080. I'd assume SDL would use the desktop refresh rate and not bother changing it to 60Hz or something.

Maybe you can check that Daz, if there's an info button on your monitor that shows the current refresh rate in the on-screen-display? 

Was that not an original quake physics behaviour? Why cant i easily jump up stairs like in darkplaces or quake 2/3. It would be very helpful as an option at-least. 

Spiney : http://www.amazon.co.uk/gp/product/B00B19T7QC/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 I am very happy with it!

ericw : The monitor stays in 144hz mode with vsync on/off with host_maxfps 72. There is a very noticeable jump in smoothness when you set host_maxfps to 144 which is why I wanted to ask about this :)

Thanks for the info! 

Quake's physics and QuakeC expect 72 fps as a server, and single player is both client and server.

Jerky lifts, killer elevators, ... 

BUGS
-
There is a lot of lag in big/complex maps
like in scourge of armagon & Airquake

Some textures can be seen through at far distances like in e1m1

Moving models and those with an attached model are very jittery when moving (the tanks in Airquake) 

Can you reproduce with the latest one from http://quakespasm.sf.net/devel ? Try a clear config (delete/move your id1/config.cfg).

Scourge of armagon being laggy suggests software rendering, what are the first 3 lines of output from entering "gl_info" in the console?

Can you post a screenshot of the seethrough textures in e1m1? 

jumping up stairs is a darkplaces change. 

^ and one that doesn't come without its own knockon effects, like increasing the effective jump height to 64 units from 48. 

In light of the map jam 3 theme, I decided to play Zerst�rer using a recent svn version of Quakespasm. I also tried it with the version that you can install from Ubuntu package manager. I downloaded the Zerst�rer package from Quaddicted. (I had to rename the file names to lower case.)

I found out that the cutscenes didn't work quite as intended with either version of QS.

The first cutscene (with the pit trap) had very noticeably jumpy camera movements at some sections. The end cutscene had the camera zoom off to the void before the conclusion and show mostly black.

There is a play-through video on YT for the maps you can watch for comparison (I think it's with Darkplaces), but I think it's quite obvious without them if you get similar results. Please try to replicate, or suggest config settings that might help (if any).

The maps with these two cutscenes are episode 2 and the end map. 

If you are on windows, can you compare against fitzquake-0.85 so that we can understand the source of the issues, fitz or us. 

The ending cutscene is a Fitz problem definitely. 

Isn't that what http://www.quaddicted.com/filebase/zerend_fix.zip is for? 

Afaik reQuiem has some fixes for that builtin and also it smoothes demo gameplay. jdhack was pretty proud of that. 

The camera jerks about when rotating, its a limitation of something in the engine - can't remember what.

Supa solved it in RMQ. 

I thought it had to do with the networking or something? Coarse values in rotations for faster transfers. 

The cutscenes use a bunch of svc_setangle messages which are controlled by setting ent->v.fixangle (sorry, I don't know the QC equivalent to this). It would be possible to lerp between consecutive svc_setangles engine-side, but there are probably edge cases (aren't there always) that need to be worked out.

Summary is that for zer cutscenes it is a combination of coarseness and widely-spaced (via nextthink) messages. 

Sends a byte angle (256 values representing 360 degrees), so using that to continually reposition the angles is going to be jerky.

[And can't be interpolated client-side because the 'resolution' of byte angles leads to inconsistent rouunding.].

Looks like jdhack has the client read it directly from the server-side camera entity in single player. 

We had daisy-changing and interpolation between multiple camera positions at once on all three axis in both rotation and position - it was pretty fucking sweet :D 

In RMQ engine, it looks like you have it reading/writing float with the RMQ protocol.

jdhack has a lot of code detecting the Zerstorer cut-scene.

I'm hoping that code isn't necessary and just doing svc_setangle as either a short (2 bytes) or a float angle would fix this kind of thing.

The choppy angles in the cutscenes in, say, Zerstorer are annoying. 

The texture bug is fixed in the latest version
Also the lag has been reduced but is still noticeable sometimes

A suggestion, allow quakespasm to read from the the game folders, not only the .pak files