Falloffs

Falloffs mask a replicator’s effect — useful for applying a modifier only in part of a scene.

Per-modifier falloff

Each modifier has its own Falloff dropdown where you pick a shape layer. The shape defines the region where the modifier applies — instances inside the shape receive the full modifier, instances outside are masked and not affected by the modifier.

Any shape layer works — a rectangle, ellipse, polygon, or star gives you a sharp-edged region, and Feather softens the edge with a gradient fade.

Invert flips the falloff so the modifier applies outside the shape instead of inside.

Clip toggles whether instances outside the shape receive no modifier at all (on) or still receive a weakened version (off). With Clip off, you get a gradual blend rather than a hard boundary.

When you pick a falloff shape, its opacity auto-lowers to 25% so you can see where it’s shaping the replicator without it dominating the scene.

Offset Falloff

The Replicator tab also has a global Offset Falloff at the bottom of the Offset section, separate from the per-modifier falloffs. It limits the reach of the Offset values (Shape Position, Shape Rotation, Shape Scale, Shape Opacity) rather than any one modifier. Works the same way — pick a shape layer, tune Feather, Clip, and Invert — but applies to the static offsets instead.