I'm making species distribution maps and have got the Atlas working perfectly using a polygon layer to show the quarter degree grid cells for species observation records. I have ~ 250 species.
The problem is that I have for most species a predicted ecological niche model (raster) which I would also like to display on the map and I can't find a way to do this using the Atlas functionality.
There's a very helpful post showing how to use rule based symbology for another polygon file but not for rasters (Filtering features in other layers of QGIS Atlas)
Does anyone know how to solve this problem?