I'd like to use the QGIS Raster Style dialog to display modified raster values. Specifically, I'd like to see a gradient using the square root of the raster's value.
I understand it's possible to use the raster calculator to transform raster values, but - if possible - I'd like to skip that step and apply the mathematical formula during the styling, and avoid creating a modified copy of the original raster.
This type of operation is possible with vector files, using data defined values for colour/width/etc. Is it possible to do this with rasters?