The first texture unit a "surface" node program's samplers occupy: unit 0
is the family-wide albedo map unit and unit 1 the §69 shadow map's, and
both can be live in the frame a node draw shares — so node samplers start
above them. A "screen" program starts at 0: an effect draw shares its
envelope with neither. Declared here — not in gl-node-program.ts —
because the renderer's finally needs it to unbind, and importing the
emitter for a constant would link it into every bundle.
The first texture unit a
"surface"node program's samplers occupy: unit 0 is the family-wide albedo map unit and unit 1 the §69 shadow map's, and both can be live in the frame a node draw shares — so node samplers start above them. A"screen"program starts at 0: an effect draw shares its envelope with neither. Declared here — not ingl-node-program.ts— because the renderer'sfinallyneeds it to unbind, and importing the emitter for a constant would link it into every bundle.