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The background
Create a plane and place in the position as in the image give it a map with a self illumination at 100, give it an uvw map and adjust the position...
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The Light
For the illumination I used 4 omni light you can look at the image for the setting (the shadow colour must be dark blue, it�s importantfor the real snow look)make some experiment to find the right setting of the light.
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