how do i make maps snow with mission editor?

[spartan101]

if you help i will give you a  or if not  will get a 

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[spartan101]

dont post comments if no help

[Light And Day]

dont post comments if no help

Thats what i wanna know, i will post if i find out kk 

[spartan101]

Thats what i wanna know, i will post if i find out kk 

thanks  got a