I'm currently in the process of making a map. I have most of it planned out, and now I just need to make the heightmap.
I usually work in SAI, though I also have gimp. However, the blur and smudge tool on gimp seem of a less good quality, and I've heard that since gimp works in 8BIT the edges of the blurred areas can still come out a little jagged, whereas when using, say, photoshop, the terrain comes out very very smooth. So my question is: Could you make a map in paint tool SAI, and then open it in GIMP and convert it to greyscale and import it into the game? Or do you have to use GIMP? And if so, is there any possible way to make the landscape more smooth and nice? Thanks!