Importing a Heightmap

I'm trying to import my Truggy Trails map from Rigs of Rods to give it the redemption it deserves. The wiki is very vague with information and I have no clue how to create a terrain file. My heightmap from RoR is a .raw file if that helps. I want to import it to the editor and mess with the hightmap (fixing some trails, add more terrain), add textures, trees, rocks, etc.

 

i know it cant be a .raw, it has to be a .png or something like that(i use .png). Try typing into the google, or bing or yahoo .raw to png or .raw to jpg . I got results for that.

 

Go under File, then import heightmap, then select the Image.

 

So rather than importing my .raw file I import the .png I used for the texture, and it'll create the heightmap in game?

 

Sort of. It'll take some fine tuning to get the height and scale proper.

 

I went to convert the .raw to a .png, but I got errors. The .raw also wouldn't import to blender. So, I took the original texture .png and attempted to import that to Drive, but it says:
"Height map must be square and power of two in size!"