For anyone experiencing exact same issue where imported ASCII is showing “blank”, it is caused by some ASCII Heightmaps have DOTS instead COMMA. TerreSculptor reads floating point values by commas, so we need to convert those manually.
- Open your ASCII Heightmap in Notepad
- Press CTRL + H (Edit → Replace)
- Replace all . to , (dots to commas)
- Save file
- TerreSculptor should now import modified ASCII Heightmap with correct values.