It is somewhat easy. The problem is that it is not a general rule, you need to repeat the changes to each biome you want.
Go to this file:
mods/stonehearth/data/biome/temperate.json (or the desert.json for the desert)
At that file, in the ver end of it, you will find this section:
"water": {
"__comment": "placement of water bodies occur at positive samples, parameters are for a standard simplex noise generator",
"depth": {
"shallow": 5,
"deep": 10
},
"noise_map_settings": {
"__comment": "simplex noise function",
"persistence_ratio": 0.01,
"bandlimit": 4,
"octaves": 4,
"range": 80,
"aspect_ratio": 1.2,
"mean": {
"plains": -5,
"foothills": -20,
"mountains": -18
}
}
}
The lines with āplainsā, āfoothillsā and āmountainsā are the values you want to change. Higher values means more chances to spawn water. I think changing the -5 to +5 will almost double the amount of water in plains, but needs testing to get the amounts right.
(plains are only the flat, lowest heights, foothills are the hills with green grass and pines, and mountains are the rock parts)
To reduce the mountains there are two options with different effects. You can change their horizontal space or their vertical height.
To have less horizontal space (more plains), look for this section near the beginning of the file
"terrain": {
"__comment": "minimum height for surface of terrain",
"noise_map_settings": {
"octaves": 4,
"persistence_ratio": 0.015,
"bandlimit": 3.5,
"__comment": "can stretch the terrain vertically to allow for long mountain ridges",
"aspect_ratio": 1
},
"plains_percentage": 40,
"height_base": 36,
"__comments": {
"valley_count": "offset of layers from base",
"step_count": "number of layers",
"step_size": "size of layer, for foothills and mountains this has to be multiple of 5"
},
"plains": {
"step_size": 2,
"valley_count": 1,
"step_count": 2
},
"foothills": {
"step_size": 10,
"step_count": 2
},
"mountains": {
"step_size": 15,
"step_count": 7
}
},
And change the plains_percentage, which is self-explanatory. 50% means half the map will be flat, and the other space will be mountains.
To change their vertical height, at that same section, change the step_count (of mountains or foothills) to lower values.
Step counts are how many step the mountain has, and the step size is the height of each individual step. So the temperate biome has at max 7 steps, each with 15 blocks of height, made with rocks (mountains) and has 2 steps each with 10 blocks height of foothills (grass mountain steps before the rocks)