Sin Gold/Base/autoexec.cfg

//add below to existing file, or create file if doesn't exist, edit with notepad.

//Better brightness and contrast without washout
//intensity increases overall intensity of light, older video cards used variables as high as 2, (voodoo/TNT)
intensity 1.3
//modulate seems to affect model brightness, older cards used high as 2.5, don't over do it.
gl_modulate 1.8
//you don't want your textures rounded down. Pathetic that this is never default off in any quake game.
gl_round_down 0
//mouse filter smooths mouse input over fps, useful for low DPI, removes jitter, personal preference
//remove slash lines to enable mouse filter
//m_filter 1
//I like my weapon switching this way
bind mwheeldown weapnext
bind mwheelup weapprev

//Beginning of Zoom Script
set my_sens $sensitivity
set my_fov $fov
alias zoom_toggle zoom_in
alias zoom_in "fov 60;wait;fov 30;alias zoom_toggle zoom_out;set sensitivity 3"
alias zoom_out "fov 60;wait;set fov $my_fov;alias zoom_toggle zoom_in;set sensitivity $my_sens"
bind mouse2 zoom_toggle
//End of Zoom Script

//hand switch, hit to toggle modes
alias handy handy1
alias handy1 "hand 1; wait; alias handy handy0"
alias handy0 "hand 0; wait; alias handy handy1"
bind mouse3 handy

//fullbright switch, hit to toggle modes
alias fb_toggle fb
alias fb "r_fullbright 1; wait; alias fb_toggle fb0"
alias fb0 "r_fullbright 0; wait; alias fb_toggle fb"
bind "f" fb_toggle

//vid restart necessary for intensity changes, only changes after reset.
//bind v vid_restart
//bind n notarget
//bind p noclip
//enjoy the tweaks

Thanks for the very useful tips! Especially for "intensity" and "gl_modulate" commands.

Also I have a question about "zoom in/zoom out" script. Is it possible to make something like this: zoom in on "mouse2" press and zoom out on "mouse2" release?

sure, you basically create/alias a hold- and release command (+ and -) similar to existing commands like +duck -duck.
for example the above script converted to such a bind:

alias +zoom "fov 60;wait;fov 30;alias zoom_toggle zoom_out;set sensitivity 3"
alias -zoom "fov 60;wait;set fov $my_fov;alias zoom_toggle zoom_in;set sensitivity $my_sens"
bind mouse2 +zoom

Thanks!

no problemo!
that script is just an example to show how it works though, i wouldn't copy paste that script since it's buggy, and you most likely want to change all the values to suit your preference anyway. :-)

My mad skills:

alias +zoom "fov 60;wait;fov 30;set sensitivity 3"
alias -zoom "fov 60;wait;fov 90;set sensitivity 5"
bind mouse2 +zoom

Works fine for me. 90 is the default FOV and 5 is my preferred mouse sensitivity.