ARRANGEMENT
Gap 0 fuses neighbors seamlessly. GAP Z only applies with USE GRID Z;
raising it splits a column into separate cubes.
FIELDS
Height and the three materials run on the same mechanism. Pick axes; with several on,
pick how they combine. No axis = const (the lo value).
LIGHT
Change the light direction with a right-drag in the view.
BACKGROUND
The backlight is always fixed to the light's color. VOID COLOR is a plain sRGB for
compositing; only the shadows are tinted by the glass.
VIEW
LEFT DRAG : orbit
MIDDLE DRAG : pan
WHEEL : dolly
RIGHT DRAG : light direction
DOUBLE CLICK : reset view