nope looks like you can't have old fuh style in ezquake, the if statements for slime/water/tele customisation override the default of using the afformentioned texture colour approximate
if (strstr (fa->texinfo->texture->name, "water"
|| strstr (fa->texinfo->texture->name, "mwat"
) {
col = StringToRGB(r_watercolor.string);
}
else if (strstr (fa->texinfo->texture->name, "slime"
) {
col = StringToRGB(r_slimecolor.string);
}
else if (strstr (fa->texinfo->texture->name, "lava"
) {
col = StringToRGB(r_lavacolor.string);
}
else if (strstr (fa->texinfo->texture->name, "tele"
) {
col = StringToRGB(r_telecolor.string);
}
else {
col = (byte *) &fa->texinfo->texture->colour;
}
glColor3ubv (col);