Problems with RAW import of heighmap

Hi,

I'm having weird issues with the import of a .raw file for a terrain. Since I'm fairly new at this I duly watched most online instructions I could find, including copying settings etc. but still I can't figure out what goes wrong and why. I seem to have 2 symptoms:

1. some data factor issue that generates repeats of the terrain, mostly 2x2 ("tiling"), instead of just 1. Halving the import width & height doesn't 'cut' to 1 correct representation, but rather shows a crop of some kind - though not repeated. At other import sizes more bizarre data confabulations happen. Though repeated or cut up, the terrain itself does resemble the original (hand painted) height map, so I think it's not in the original file or it's export, rather in the data import settings that something goes wrong.
2. To test, import of a simple generated-cloud height map appears to work fine. But if I try to import a square with a perfect black-to-white gradient, the above "tiling" or "cutting" happens as well, plus the perfect gradient tones are translated in much more coarse textures. I attach 2 fairly artistic examples.

Terrain width and length are kept at the standard 500 most of the time - if I change that, I'm even more at a loss what is affecting what.

Thanks for any help!

 

Hi again,

I found a solution, posting for whomever has similar issues:
- When exporting, make sure the raw file is in greyscale. I had it in RGB apparently (though it was in greytones) which created the 4 joined repetitions (one per channel)
- The grainy texture effect (visible in the gradient examples) appears to come from a high resolution setting. I reduced the greyscale to 8 bit (from 16), and reduced the square size from 2048 to 512. That made it smooth again.