"educated Guess" for Create a Terrain Popup.

[Sythelux]

The Popup has 2 Fields, which are about the heightmap image (see provided pic).

when I choose the wrong heightmap algo the "create" button will throw an error. So there seems to be a way to decide which heightmap algos are suitable for a provided pic or not. We should filter heightmap algos out, that are not possible with the provided image.

(my guess is, that there is only one algorithm possible and we can drop the field anyway and reduce confusion)