I have nine adjoining DEM layers (3x3) styled as 'hillshade' but there are some obvious artefacts, particularly where tiles meet. I've exported the hillshade layers to TIFFs in QGIS using the 'rendered image' option, edited them in Photoshop to remove the artefacts, and then imported the updated files as raster layers in QGIS. However, QGIS is insisting on applying some kind of Style to the new TIFFs, instead of just rendering them the same as I see in Photoshop. They therefore look completely different to the originals, which were the style I wanted but had artefacts.
The top half of the image below is an original DEM layer with 'hillshade' style, while the bottom is a TIFF from Photoshop.
I had naively assumed that I could just re-import them exactly as they showed on-screen in PS.
Am I doing something wrong, or is this simply not possible?
I guess I'm looking for something like an option in the "Render type" box for layer style which is just 'unaltered' but I don't know how to say that in QGIS-speak!
I'm new to GIS generally, so may be missing something obvious, but I've searched high and low and can't find what the problem is.
If I copy and paste the style onto the newly-imported TIFFs, it seems to just add the hillshade on top of a TIFF which is already hillshaded, so I get double-hillshade (applied to the bottom half below):