Requires JoeyCMDs
http://addons.eventscripts.com/addons/view/JoeyCMDs

Attention!ª! To use JoeyCMDs you just install it you dont need to add it in autoexec.cfg!

Credits
Thanks to SuperDave has always.
Holliday help was really the key ;)
McFly script for not reinventing the wheel

COMMANDS

bind !thermal

CVARS

Add to you server.cfg

use_overlay "effects/combine_binocoverlay.vmt" //What overlay should be used?

see_thru_walls_sprite "effects/strider_bulge_dudv_dx60.vmt" //Special seen thru walls sprites

refresh_rate "0.2" //what rate should the image be refreshed? less times more CPU -- bigger timer less CPU

NEW CVARS

maximum_distance "2000" //distance at wich stops showing
minimum_distance "300" //distance at wich shines brighter

Mathematical Example =

http://upload.wikimedia.org/wikipedia/commons/4/4d/Proporcionalidad_tabla_6.png

http://upload.wikimedia.org/math/0/f/5/0f5f2a63888298a61919744a59450179.png

I made it with Half Life 2 available stuff only but you can do it with some nvgs from FPSBANANA and create an almost real-life sprite that can give you much more realism!(if you get a nice one please leave details for others at forum)

Features!

-Thermal vision is now available!!!(more like wallhack :P at this point since I got bored of looking to FPS Banana).
Looks much like the amxx one but can be made much better.