Young pine trees in snow and hoarfrost from 2 to 6 meters high.
MAX 2013
FBX 2011
faces: 841.423 (from 70k to 300k per tree)
Trunk and Snow uses displacement which can be turned off to speed up and save RAM.
Vray 3 and above Corona 1.6 and above in the Corona scene only a sample cube of the material! It must be inserted into the trees scene and its material applied to the trees.

Because Because the FBX format does not save the falloff curve of trunk and branch material the lower and upper points on the falloff curve require manual correction.

2k preview: https://www.youtube.com/watch?v=uaZIhvUnr0E