The dust is made using different dust particles as small grains and hair like polygon structures and randomly cloning those on the surfaces using mograph. The material for those is a translucent diffuse with slight variations in diffuse brightness as well as translucency coming from a random texture node.
As always I hope you like it!
Generated in C4D mostly with SDS (subdivision surface) modeling.
Textured shaded lit and rendered in Octane 3.08 C4D.
Rendered in 4K 4096 X 2160 px.
Rendered on 3 GTX 1080Ti
Render times was around 11 min