The new toolbar will provide the following tools:

Altitude scaler: With this, the editor can scale the whole terrain to a percentage of it’s original altitude (both max and min altitudes). This will be mostly useful to adjust imported heightmaps since it is usually not that easy to scale heightmaps correctly using regular image editors.

Sea level adjuster: Self-explanatory, it replaces the sea level slider of the world generation customizer. With this, editors will be able to see the results of changing the sea level without having to restart the generation process from the beginning.

Global temperature adjuster: Same deal as with the sea level adjuster. It replaces the slider on the custom world generator.

Global rainfall adjuster: Same as the previous two. Only for rainfall.

Altitude brush: This will allow the editor to “paint“ mountains (or trenches) over the terrain. Or “erode“ them away.

Temperature brush: Just like the previous brush, It will give the editor the capability to adjust the temperature on selected areas of the map.

Rainfall brush: Same deal as with the temperature brush, only for rainfall.

As you can surmise, The custom world generator from previous versions is going away. Now, every time a new map is generated (either randomly or using a heightmap), the player will get a chance to edit the map using these tools before starting the simulator, and there won’t be need to copy the seed number and restart the generator just to adjust a parameter.

There won’t be a tool to set up biomes directly. Biome modification will only be achieved trough changing any of the base variables: altitude, temperature, and rainfall. This in my opinion will make more sense and give way for more “realistic“ terrain. In any case, is harder to do the opposite and calculate altitude, temperature and rainfall from a biome.

All of this is still a work in progress. I’m going to keep working on the toolbar through the holidays though at a lower pace. I might not be able to post an update until January but I will try to. In the mean time, let me know if you have any suggestions for the editor and what to do with it.