I've done the catlikecoding tutorial on hexmaps (which I recommend). But for performance issues at run time meh (the texture has to be quite large for the whole chunk). With maybe the RGB for the texture and alpha for the height. The second approach was to use Height Maps of mountains and 'paint' them on a blank texture which I apply on the chunks (with something like setPixels/GetPixels). I'm also using chunks for performance and the transistion seems complicated. But I'm not sure what type of mask I should use (for now I've made a non-optimised one with a gaussian function in the center of the selected hex but the result is not very good with the noise (maybe a mask in x^3?)). My first approach was to use Perlin noise and a mask to tell which hexs has mountains on it. (Maybe a hexagonal mesh is not the good approach?)

With maybe a procedural generation in the futur. I want to be able to click on hexs to generate mountains (or cliffs, etc). I already made a hexagonal mesh where i can define a resolution for each hex. I would like to make a 'realistic' terrain, like in civilization 5 or 6 for exemple.

I've already tried some things but I'm not experienced enough to tell if it's feasible. I would like some guidance on the method I should use.

I'm currently trying to build a Map Editor for a Hexagonal Grid based game.