I created several Heightmaps in GIMP to practice, and these are those worth sharing. The package includes 5 2049x2049 Heightmaps in PNG and RAW (8b Windows & 16b Mac) formats.
The 8 bit version is the direct port of the PNG’s to RAW, while the 16 bit version was smoothed with TerrainToolkit.
(Note: Maps may require further smoothing in those areas close to the player)
This work is released into the public domain. More information.
4th map (Smooth version)
5th map (Smooth version)
I will probably not submit this package to the Asset Store. I apologize for any mistakes I may have made, since English is not my native language.