How to make new Terrain Types (in Warlords but i bet theres no big difference)?
I basically want to add hills and peaks to the ocean ground as deep sea (worriing about the 3d model later).

I changed
Assets/XML/Terrain/CIV4TerrainInfos
Assets/XML/art/CIV4ArtDefines_Terrain
by duplicating its ART_DEF_TERRAIN_PEAK and renaming it in ART_DEF_TERRAIN_OCEANPEAK (in my mod folder that loads nicey with other changes like the ocean walking settler)

It doesnt show up in worldbuilder so what am I missing?
(The search function mostly gives civ3 related answeres or says it can be done in XML only but never how.)

Just noticed my added terrain type shows up in the civilopedia, but not in the world editor.

Now I half way figured out how to add terrain types. (propably had problems due to the cheat code=cipotle)
I added some "underwater desert" and "underwater plains" and its in the world builder.
Sadly its really messing up the "coast" and of course textures are barely correct because its underwater (over water works nicely).

Now I want to duplicate the "changes plot into a mountain" and "changes plot into hill" height types.
(to add a second type of hill tho the existing hill, higher than a hill and lower than a mountain)
The hill button name "changes plot into a hill" only shows up in
CIV4GameText_Misc1
as
TXT_KEY_WB_PLOT_TYPE_MOUNTAIN
but I cant find that adressed somewhere else to duplicate it.

I also still dont get everything about height maps. I changed them succesfully but cant find where and how they are adressed to duplicate heightmaps for a second hill.