Plotting a equirectangular black and white map with no margins at all

I created this issue to let written what was commented between @otinto and @fbeninca.

The idea is to be able to use mapgenerator to create the inputs that are necessary to convert some netCDF to a more visual plots like the following example:

or some VR stuff like what can be found in: https://www.youtube.com/watch?v=5KLgBYTvb1A

To create this kind of things using blender, what is necessary is to have a plot with an equirectangular projection without any margin that covers the full globe. The plot that was used to generate the examples was the following one :

(it was scaled down to fit it here, the original size was 9288 x 4647)

Having high resolution becomes important for ultra-high resolution VR (8k), not so much for other purposes.