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If you are also fed up of growing trees on mount everest than this patch is for you!
Apply patch, compile and start the game.
Then exit the game by closing it.
Two new variables "trees_around_snow_line_range" and "no_trees_on_this_level" are written in openttd.cfg.
Both have value 0.
"trees_around_snow_line_range" handles tree growth around snow level.
If you for example set it to value 6 the program will put mixed forest from 6 tiles below snow line until snow line.
From snow line to six tiles above it will put arctic trees thinning out towards the snow.
"no_trees_on_this_level" gives you the possibility to skip a level for tree growth.
If for example you don't want trees on level 1 and 4 you have to fill in value "20" or 0x14 or "60" or 0x41.
You can do this for the first 16 levels. The max value is 0xFFFFFFFF.
If this value is set to 0 the patch stops working and everything works like the original game.
The next two foto's below are with settings "no_trees_on_this_level = 0x134" and "trees_around_snow_line_range = 6"
And..... stolen trees!
This patch will do for me.
If you have exotic variations please feel free to post them..
Have fun!

So, basically this does the same thing as the Tree line height patch?

Another approach is to generate rocks above certain height (for example by modified GenerateClearTile in clear_cmd.cpp),
it also block tree growth and additionally makes terrain leveling more challenging.

archy wrote:So, basically this does the same thing as the Tree line height patch?

Yup.
I didn't know it existed.
With mine you can also stop generating trees on some lower levels 0 to 16.
You have to experiment.

can you elaborate what you mean by alpine trees? does this mean that above a given height there will only be coniferous trees and no deciduous? If so that alone sounds like a good use case!

Best,

What I did was combining the trees of two climates. arctic and temperate.
The idea is to use temperate trees in the lower parts and arctic in higher places.
I used a zone below the snow line to mix arctic with temperate.
The patch is very simple, but it gives you the possibility to adjust forrest to your own liking.
The effect however is highly dependent on the Tree GRF u are using.
I like the stolen trees GRF. But that is personal.

Sounds great! What about Tropic - Temperate - Arctic? So an additional zone to let one have tropic trees in the lowlands, temperate in the highland, and arctic up on the mountains? Or any other mix the user sets...

What about snowlines that vary with the seasons?
It will be at least a month before I can test this very interesting patch.

Any chance of a Windows binary of this please?

SwissFan91 wrote:Any chance of a Windows binary of this please?

Yes.
This is done with Cirdan's New Map Features branch which is currently synced with openttd r27220.