save_tiff

[StyXman]

I've been looking for automating the generation of ray tracing based hillshading for a long while. I'm using traditional hillshading in a OSM derived map (a fork of osm-carto), and I use a TIFF layer for the hillshade.

I know I could use save_png() and then use some other tool like convert to convert to TIFF, but PNG is only 8bits per channel, while TIFF can be (and I use) 15-16bits per channel (it's Int16, so 16 bits, but only 15 used; hmm, I should review that).

So, do you think saver_tiff() can be implemented?