SLAVS-HELLENES-CELTS 3000 B.C.
I have made the change for desert special to:
Bedouins, 1,2, 1,1,3,
Does this seem OK?
In Rules you can set what terrains can be converted to. One solution for coal & oil would be to hide them under other terrain types (extra ones called something like 'Potential mine/well'). These special resources could only be accessed when you have the Industrial Engineer unit with the 'Transform to ... o' ability. Using ToTPP cheat menu Control + F8 (then Control + 1/2) and the Edit Terrain Hotkeys (see ToTPP launcher)
Edit Terrain Hotkeys
Adds keyboard shortcuts for changing terrain / tile improvements. In cheat mode, change terrain with 0 (Desert) to 9 (Jungle) and Ctrl-3 (Ocean) to Ctrl-8 (Extra terrain 5). Use Ctrl-9 to add/remove a river.
For tile improvements, the following keys can be used in cheat mode when no unit is selected:
r: Road
o: Railroad
i: Irrigation
m: Mine
l: Farmland
f: Fortress
e: Airbase
p: Pollution
See also
Transform Requires Tech:
Adds a check to the transform order to see if the tribe has the technology required to transform that particular terrain type. This allows the player to e.g. make transformations of "easy" terrain types available earlier in the tech-tree. Configurable by adding a @TRANSFORM section to RULES.TXT, consisting of one line per terrain type, containing a tech abbreviation and a comma, e.g.:
@TRANSFORM
U1, ;Drt
nil, ;Pln
...
X1, ;Oce
Notes:
The order of terrain types is the same as in the @TERRAIN section.
"nil" means no tech requirement, though you will still need a unit with engineering capabilities.
@TRANSFORM1 .. @TRANSFORM3 can be used for secondary maps, similarly to @TERRAIN1-3.
The popup that shows up when the tribe doesn't have the required tech can be overridden in GAME.TXT using the key @TRANSFORM.
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Using these abilities when building a scenario would allow you to place coal mines in Britain that cannot be accessed until the Industrial Revolution & Oil wells in the Middle East that cannot be accessed until you have researched the technology needed for the Engineer unit & an Oil Industry technology that allows you to drill for Oil using the Engineer.
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Lua events could expand on this even further, but they you are building a full-on scenario & not just a modified Vanilla game.
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I would like to develop this concept further, but not for our current game.
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Here is the current Technology tree. I just need to add wonders, technology effects & colour code the epochs (historical eras):