Macros

The macros are the controls. Each runs from -1 to 1 between two words for the sky, and 0 is the seed's own sky. Set them in the project's [macros], which starcanopy new fills with every macro at 0, or on the command line with --macro NAME=VALUE.

Macro	-1	1	What it moves
open	enveloping	open	how much of the sky the gas covers
dense	tenuous	dense	how much the gas hides where it is
fragmented	whole	fragmented	gas broken into pieces with clear sky between
detailed	smooth	detailed	fine structure in the gas
billowing	wispy	billowing	rounded billows, or ridged filaments
crisp	soft	crisp	hard edges and hard shadows
turbulent	calm	turbulent	gas buckled, swirled and blown out
luminous	brooding	luminous	light from within the nebula
bright	dim	bright	the whole sky, as an exposure
hazy	clear	hazy	a glow over the sky, the dark between not black
vivid	muted	vivid	how colourful
starry	sparse	starry	how many stars, and how bright
galactic	remote	galactic	where in the galaxy: in toward its centre, or far out

Macros add: two that move the same dial move it together. Every name has been confirmed blind -- picked as the side it names on the skies it was scored on -- though how far each end goes may still change.