Talk:Hillshading using the Alpha Channel of an Image

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Notes about the script for generating these tiles

  • Doesn't use Metatiles
  • Has artifacts at the edges of the raw DEM "tiles"
  • Experiment with combined lighting rather than a single light
  • Use dynamic, on-the-fly rendering, rather than pre-rendering? Might be very memory intensive.
  • Use single-step hillshading and alpha-channel modification to save time (don't write intermediate file to disk)
  • Some claim there is a ~50-Meter offset to the ground truth
  • Use GDAL for the hillshading step, not PerryGeo's demtools