hmm... some realy WEIRD info, but i spent a half week to understand how it works:
"$envmapcontrast" & "$envmapsaturation" must be used in VMT both - if you try to use only one parameter - in most causes it will not work (bug No1)
"$envmapcontrast" "value"//Adjust brughtness of reflection. Can be set from "-6.0" to "6.0" , but dont use "-1.0", "0.0" & "1.0" values (in that case "$envmapsaturation" don't work - bug No2). Default value - "0.01" - normal env_cubemap reflection. Negative values set brightness up, positive - down.
"$envmapsaturation" "value"//Adjust saturation. but dont use "-1.0" & "1.0" values (in that case "$envmapcontrast" don't work - bug No3). Default value - "0.99" - normal env_cubemap reflection.
"$envmapsaturation" values table:
from "1.01" to "3" - makes colors warmer + more saturated.
from "0.0" to "0.99" - makes colors full desaturated at "0.0" to normal saturation at "0.99"
from "-1.01" to "-3" - makes colors cold + more saturated.
Some old screenshots were i played with this values:
http://projectd2.com/hl2screens/displayimage.php?pos=-3 - some desaturation
http://projectd2.com/hl2screens/displayimage.php?pos=-6http://projectd2.com/hl2screens/displayimage.php?pos=-8 - full desaturation
http://projectd2.com/hl2screens/displayimage.php?pos=-2And anower screens here
http://projectd2.com/2007/weee.rar (2.7mb)
Copper & aluminium textures here
http://projectd2.com/2007/weee.rar (500 kb)