Kia Ora
[Photoshop]
I'm real green at this so if somebody with more skill wants to edit and make a tutorial outta this thats fine.
I wanted to make an ingame map of tamriel for the Tamrial Worldspace Projet that had the mountains etc, not
just a flat plain.
1/ I patched together all the landscape .dds files in the correct order, thery are the generated 60.00.96.32.dds
getting them in order means the match at joins
2/ I do same for the _fn.dds files these are the blueish normalmaps
you need to touch up and do what ever other stuff you wish to the texture, names, labels etc can be added here or better yet a seperate layer (easyer to edit)
Copy the texture and paste as a layer over the normalmap (make 2 layers)
Select one layer and filter to multiply, slecet the second layer and filter to colour
you now should have a map image with all the landscape mountains, vallies and terrain of your world landscape.
Keep in mind any changes or edits will damge you landscape so edit only the texture and repaste you layers, you can (I think) get away with colour balance, stauration and the like
of the layers but once merged you need come back to your psd to make changes,. this is maybe why names lables etc would be better as a layer but you still cant edit thos on merged
image.
You can probley do this in Gimp too but I never have and don't know filtering in Gimp or like tools
Edit:
apon thinking a little TES4LODGen will help with steps 1 and 2 making joining much easyer