CC Composite stays After Effects-pure: its Layer parameter is gone, so
parameter indices match AE again (scripts and expressions that address
parameters by index). The model reference lives in its own effect,
ec.3d.instance3d (3D Channel, CPU, one layer parameter), which replaces
the layer's pixels with the referenced layer's render — alpha included.
A referenced model's solo render is now hashed into the owner's cache key
instead of declining the entry (Bflat, review of #2410): the layer, its
animated values and transform, the mesh item, the comp camera and lights,
draft 3D, the renderer setting and the in/out gate. Covered by a render
test: the copy is cached, served on the second render, and re-rendered
when the camera pans or the model leaves its in/out range.
A soloed model keeps its Solo switch with its video off, and any_solo
hides non-soloed layers: the copy was excluded and the comp rendered
blank. The copy now takes the Solo over; the source's video stays off.
Covered by instance3d_keeps_the_copy_visible_when_the_source_is_soloed.
PR #2491 moved the modules; the instance3d changes follow the new layout:
- tests_instance3d.rs lives in src/tests/instance3d.rs now (declared in src/tests.rs)
- solo_3d moved from render/src/lib.rs to render/src/pipeline.rs, pub(crate),
and its FxHost::layer caller moved to render/src/fx_host.rs
- cmd/create.rs, effects/channel2.rs, gpu/fx_pixel2.rs and render/cache/dependencies.rs
followed their moves automatically (rename detection)