In QGIS I'm trying to merge several ASCII (.asc) ESRI files in REGCAN95 (EPSG:4083) projection together to make one big file, and then convert it to GeoTIFF (.tif) in WGS84 (EPSG:4326) projection for use in an orthographic scenery generator (Ortho4XP).
So far I have tried importing the .asc files as raster layers (Layer>Add Layer>Add Raster Layer). I then use (Raster>Miscellaneous>Merge), select all the layers and save it as a .tif. I then use (Raster>Conversion>Translate) with the output projection set to WGS84 (EPSG:4326).
However when I attempt to use the resulting file in the scenery generator, it generates a completely flat landscape as if the elevation data has been lost. I can't figure out what I'm doing wrong.
Does anyone have any suggestions for how to do this in QGIS, or using an alternative method to achieve this?