Hey
John Thank you for your kind comment.. well the technique is really easy:
1. take a generous amount of plaster on a ice cream stick put it gently on the ground that you have previously sprayed with water
2. apply it gently with a brush (number 5) that has been wet with water, all over make sure to leave good thickness where snow will fall and remove where the snow will not logically be
3. spray water to make sure that the "snow" fill flow as per gravity...
4. Wait that it dries... i would say about 2/3 hours....
5. clean excess
6. Repeat process adding little by little
There you go I hope it helps... i will put the next step with the snow powder