My program Total Terrain allows precise manipulation and is totally free. You can also paint a colourmap directly onto the terrain.
Find it by clicking my sig. There are 2 versions (1 and 2!) 2 is a complete rewrite, so you might try both to see which interface you prefer - personally I think 2 is better.
Find it by clicking my sig. There are 2 versions (1 and 2!) 2 is a complete rewrite, so you might try both to see which interface you prefer - personally I think 2 is better.