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Minher0
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Layer > Create > Create 3D Layer Instance, as After Effects (public docs):
3D model layers take no masks or effects, so the command puts a comp-sized
solid at the top of the layer stack with CC Composite referencing the
selected model, and switches the model off (back on to keep its shadow) -
a 2D copy of its render, through the comp's camera, that 2D effects can be
applied to.
- CC Composite (ec.channel.cccomposite) gains an optional Layer parameter:
with a layer chosen it takes the original's place; In Front replaces the
solid's pixels, alpha included, the other Composite Original modes blend
with them. The GPU compositor runs such an instance on the CPU.
- FxHost serves a referenced model or primitive layer as After Effects
does - the layer rendered on its own through the comp's camera
(Renderer::solo_3d); the owner keeps no cache entry for it (it moves with
the camera and lights, without a trace in its own properties).
- layer.create {op: instance3d} skips layers that are not 3D model or
primitive layers (the ones that take no effects); one undo step, the copy
selected, the model's video off.
Tests: tests_instance3d.rs (behaviour, pixels, undo/redo, serde, 2D effects
on the copy), a CC Composite layer-parameter unit test; docs/effects.md
regenerated (3033 parameters).