Tgen light 1.2 patches by chillcore.
https://devs.openttd.org/~alberth/diffs/tgen_light/ is the patch queue with some shuffles by me.
Below the same list: name of the patch, commit message, and my informal explanation of what happens

10_optional_init_map_at_zero.diff
		Codechange: Initialise map at level 0 instead of -32k (chillcore)
	Special value isn't used (and overwritten on the first sweep anyway)

20_optional_more_water.diff
		Change: Slightly more water in the non-custom sea levels (chillcore)
	Slightly more water in the map.

30_optional_improve_coast_generation.diff
		Change: Generate more detail curves at the coast (chillcore)
	Slightly less water in the map, and more curvy coasts

40_Tgen_light_Fix_tropical_forest.diff
		Fix: Generate tropical forest was broken at the low 1/4 of the current height instead of max height (chillcore)
	tropical hills are 'green' now too instead of just around water.
	much less desert

50_Tgen_light_Generated_height.diff
		Fix: Tune down terrain generation to reduce amount of long slopes (chillcore)
	reduce height of the mountains (in tropical leading to more desert again, less hills to make 'green')

60_Tgen_light_Magic_nrs_smoothness.diff
		Codechange: Replace magic nrs for the smoothness setting (chillcore)
	add enum for smoothness setting

70_Tgen_light_Three_arrays.diff
		Fix: Tweak noise generator more precisely for different map sizes (chillcore)
	more specific arrays for different mapsizes.