FStorm Volumetric Material has to be assigned to an object with FStormVolumeMod modifier to give proper volume look. FStorm Volumetric Material will not work with any other geometry.

Scattering color sets scattering color dispersion through the volume.

Absorption color sets overal volume color.

Emission color sets volume illumination color.

Scattering direction sets everage scattering direction along the ray. Zero values give uniform scattering dirrections and produces smoke/dust look. Higher values give fog/steam/cloud look.

Scatter glossy produces scattering hilight along the ray.

Distance sets volume density. Higher distance gives less density. Lower distance gives higher density.