Previously, papyrus was limited to the savanna biome.
Rainforest is a suitable habitat for papyrus.
Makes papyrus a little less difficult to find.
Move swamp jungletrees into a separate registration, to allow
applying distribution by perlin noise to keep these away from
papyrus areas.
Fix error: Remove non-functional 'rainforest swamp' from the
biome list for the jungle log decoration. It is not placed in
swamps due to the 'y max/min' and 'place on' parameters.
Icesheet ice dungeons now have ice stairs.
Remove some now-unnecessary sandstone mapgen aliases, one
remains as it is required by the dungeon loot mod.
Re-arrange mapgen aliases to separate those needed for mgv6.
In preparation for biome-defined: dungeon materials, cave liquids,
stone type, ores, decorations.
'_ocean' biomes now extend to y = -255 to be deeper than default
mgv5 oceans, and to create 'shallow underground biomes'.
Remove unnecessary biome lists for gravel and silver sand blob ores,
as those are already defined to only appear in default:stone.
Alter 'large cactus' schematic to place another force-placed cactus node,
to replace the cactus seedling on growth.
Make schematic 5x7x5 to solve rotation, placement and protection check
issues.
Add a y-slice probability for height variation.
Growth time is tuned to not make this a faster way to obtain cactus nodes
compared to normal cactus farming.
Seedling texture by Extex101.
Use sapling/seedling description in protection intersection message in
'sapling_on_place' function.
Iron at y = 0 was far too easy to find.
Adjust gold lower region to be twice the depth of highest level, like
all other ores.
Diamond at y = -500 was too easy to progress to.
Make diamond and mese block deeper to create a depth progression from
mese crystal to diamond, to reflect tool progression.
This all creates a satisfying 2^n depth progression, with lower regions
being at twice the depth of highest levels.
Use noises to create a varying mix in coniferous forest biomes:
Areas of large pines only, areas of small pines only, mixed areas.
While also having areas of high and low tree densities.
Saplings grow into large or small pines with equal chance.