By J. Bovy et al. (2016); dust map by G. M. Green et al. (2019)
What it does
mwdust reads published maps of Milky Way dust: the 3D maps of Marshall et al. (2006), Sale et al. (2014) and Green et al. (2015, 2017, 2019), the model of Drimmel et al. (2003), combinations of these, and the 2D map of Schlegel, Finkbeiner and Davis. A 3D map stores, for each pixel of the sky, the reddening as a function of distance, and mwdust interpolates it.
J. Bovy wrote the package for Bovy et al. (2016), on modelling the density of the Galactic disc with the effect of dust on star counts included. It is open source.
How I used it
I used mwdust for the extinction of the Ariel targets in my MSc thesis (Sect. 4.1.4), favouring the 3D dust map of Green et al. (2019).
The animation
Everything in the animation is drawn. The positions, sizes and densities of the clouds, the reddening curve and the reddening of the beam illustrate how a 3D map is read. No value from a real map is shown.