The rocks along with the textures were made by myself. The snow shader was created in UDK. It has customization that lets you control the amount of snow on the object. The snow is always positioned on the Z-axis so no matter how you rotate your object it will always be on the top. Giving the effect of snow buildup.
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"You will never do anything in this world without courage. It is the greatest quality of the mind next to honor." - Aristotle