I'm trying to make some height maps with elevation data from https://earthexplorer.usgs.gov/. Since they give you assets in separate TIF tiles, I need to convert them to PNG and stitch them together to the area of land that I'm trying to extrude in Blender. The only problem is, once I run
gdal_translate -of PNG -ot Byte -scale input.tif output.png
with QGIS's terminal, the output png has all it's values 'normalized'. It end up looking like this in photoshop when I try to put the tiles together.
I partially can get around that by tediously adjusting contrast for each tile so they look normal to the eye, but it's always got artifacts in it. Is there a way to avoid this when converting with gdal?