PolySnow - a 3DSMax plugin for creating realistic snow with a click

A variety of parameters lets you get the desired results in every situation.

Features:

• User friendly user interface with some explanation tooltips on buttons.
• Live parameters let you adjust the snow at anytime you want.
• Non-destructive workflow.
• SnowMerge is a powerful tool lets you connect snow meshes seamlessly.
• Full control over the calculated mesh.
• You can change the settings and get a large number of variations.
• Very fast particle calculation with a different resolutions option.
• Add or remove snow from the areas you want by using edit particles tool.
• Multiple layers of snow can be created and combined seamlessly.
• There is also mesh resolution settings so you can create a low poly or highly complex snow objects.
• Can be used for multiple objects at the same time.
• Polycount of the original object doesn't matter for snow quality.
• You can sculpt the snow for more detail with a edit poly modifier.

Plugin costs $19. More info here.