Simple Map Making Question (For people with Paint tool Sai)

[Willowwisp]

So I just re-downloaded FH in hopes that the game runs smoother on my new computer, and I've decided I really wanna try making a map! Except I don't want to download GIMP and I have Paint Tool Sai instead, but there is (as far as I know) no grey scale mode. When I did save a test height map in just black/white (I saw somewhere it would work) it crashed the game so I'm guessing that's not how to do it. I know there's a way, but can anyone tell me what it is?

[Hooli]

Although it's the wrong place, Sai should work fine; I genuinely don't see why it wouldn't, providing it's saved in the correct format (I've never used GIMP myself for maps!). I'll give it a go in a moment- just to see if it there is an issue.

Edit: There is an issue! Sai doesn't appear to have a grayscale mode which is seemingly pivotal for map-making. Whilst the map I quickly scribbled is solely made of grays:



It's still in RGB mode (aka, you can still use colours on it); Sai doesn't seem to have an option to swap to Grayscale (which I think GIMP does). It's best to use GIMP or Photoshop I'm afraid!

From the Manual:

3. The image must be saved/edited in grayscale mode and cannot consist of or use colours(If not the game will crash)

[Willowwisp]

That's what I was worried about v.v I knew there needed to be that mode, but I just was hoping I wouldn't have to download more programs. I suppose it's time to download more space.

[Hooli]

That's what I was worried about v.v I knew there needed to be that mode, but I just was hoping I wouldn't have to download more programs. I suppose it's time to download more space.

Aye, sadly that's the case. 
Hopefully sometime in the future SAI gets an update with a grayscale mode.