How do I import in FT3 ?

[Deadshade]

I have a contour map in GIMP and the same already edited a bit in Wilbur. So I can save in about any format.
I would like to continue editing in FT3 but whatever I tried failed.
Does somebody know what formats can be imported into FT3 ?

[waldronate]

There and Back Again may be useful starting at "Back Into Fractal Terrains". You can load the contour map as an image overlay provided it's 5000 or less pixels across. Larger maps will need to be split into smaller pieces that can be loaded as image overlays. Note that all data needs to be in the Equirectangular projection.

[Deadshade]

Thanks. I missed the 5000 limit and I also got this "flip" effect that I didn't know why it happened.
Helped a lot and I hope I will not forget it !