where does one buy these? 

why does the Quakespasm still have that "skin is taller than 480 issue"? At number of other engines have took care of that, why can't Quakespasm? 

Version 0.93.2 of QuakeSpasm is released.
Changes since the previous version:
https://sf.net/p/quakespasm/news/2019/11/quakespasm-0932/
Downloads:
https://sourceforge.net/projects/quakespasm/files/
http://quakespasm.sourceforge.net/download.htm 

... please? 

what is the command to disable fullbright in the quakespasm engine? 

... in the console.

Posted in the vein of "give a man a fish" VS "teach a man to fish". 

got it. Thanks! 

After finding much success with EZQuake and 3620x2036 DSR enabled via NVIDIA settings I notice that QuakeSpasm cannot handle the DSR resolutions well: the console rendering gets all whacked. 

Define "all whacked"
I can run it in 7680x4320 and it looks just fine.
Have you tried changing scr_conscale? (also scr_menuscale, scr_sbarscale) 

Well, this is odd: I tried to take some screenshots to show exactly how it is "all whacked" only to realize that screenshots in fact show the console and the entire screen rendered correctly. It's only on my actual screen where things look wrong.

As I started paying more attention I realized that going above the screen native resolution of 2560x1440 increases the overall "zoom level" of the screen. When using DSR resolutions, I can clearly the the bottom "status bar" dissapear and the left side of the console window falls outside the viewpoint. As the DSR resolution is increased further, so increases the amount of this "zoom" leaving out borders of the screen out from view.

Are there some other cvars involved? 

Apparently QuakeSpasm was trying to used windowed mode instead of fullscreen. 

Setting cl_bobcycle to "0" makes the screen go grey.
Found this out after a long battle to get things to work again. 

Setting cl_bobcycle to "0" makes the screen go grey.
There's a division-by-zero in the original code with cl_bobcycle 0 - "cycle = cl.time - (int)(cl.time/cl_bobcycle.value)*cl_bobcycle.value;" - whether or not it makes your game go nuts probably depends on compiler options/etc and unfortunately in the original engine it was OK but in some ports it's not.

So just set it to a really low value until the QS devs fix it. 

I think the intent was "cl_bob 0", not bobcycle 

I had an config file which works good with many engines. At some point though I only got this grey screen in quakespasm. After finding the solution I wanted to post here to help anyone experiencing the same problems. 

Yes, "cl_bob 0" is obviously the intended way to disable bobbing in the engine, but unfortunately "set cl_bobcycle to 0" is one of those items of "Quake lore" that gets passed around, which accidentally works some of the time, but which is actually wrong.

Fortunately it's an easy fix in the code: just check if it's 0 and set cycle to 0 if so: https://github.com/id-Software/Quake/blob/master/WinQuake/view.c#L117 

So, I woke up at 3am, bored, and well here's this..

https://youtu.be/2SABwkUnqRE

in r_alias.c

i just added the shade variable in GL_DrawAliasShadow
after..

R_LightPoint (e->origin);

shade = (((lightcolor[1] + lightcolor[2] + lightcolor[3]) / 3)/128);//R00k

//then

glColor4f(0,0,0, shade * (entalpha));//R00k: fade light based on ambientlight

//before

GL_DrawAliasFrame (paliashdr, lerpdata); 

un-private the video fella 

https://www.youtube.com/watch?v=2SABwkUnqRE 

Hello. There are any chances to see WinQuake's software render with oldschool look/atmosphere and QuakeWorld servers support? 

Quake Qbism. 

qengine
engoo 

"QuakeWorld servers"
Zquake