Explain order of alpha blending

[gjanee]

How could the content be improved?

The lesson says, "We can layer a raster on top of a hillshade raster for the same area". The order in which the layers are plotted using alpha blending matters. It's not clear why the order matters, nor is it obvious which is the "right" order. The lesson should clarify this.

Which part of the content does your suggestion apply to?

Plot raster data