sky shader and clouds

[Pete Edmunds <pete(at)eclipsecreative.co.uk>]

i stumbled across this tip about connecting clouds with the sky shader in XSI.

http://mentalraytips.blogspot.com/2007/02/clouds-with-mental-ray-sky.html

he describes it as
"as a spherical environment map plugged into the haze parameter of mia_physicalsky. That's basically it!"

the mia_physicalsky in xsi 6 doesnt let me plug anything into the haze value, so i edited the SPDL from this

    Parameter "haze" input
    {
        GUID = "{A057D5D1-B526-486F-A749-F83EBA55CFD3}";
        Type = scalar;
        Value = 0.0;
    }

to


    Parameter "haze" input
    {
        GUID = "{A057D5D1-B526-486F-A749-F83EBA55CFD3}";
        Type = scalar;
        Texturable = on;
        Value = 0.0;
    }


but i can't seem to get it to work. has anyone tried?

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