SplatDissolve

3Dv1app

Overview

Dissolves splats away — the effect node for reveals, disintegrations and hologram assembles. A FIELD decides the order: sweep runs from your placed ▶ start point to your ⏹ end point (click them in the 3D viewer), noise sizzles everywhere at once, distance grows from the start point outward, axis wipes along X/Y/Z, matte projects a 2D matte through a camera and dissolves what it covers (a Roto or Crucible key eating a capture — the cross-system trick). Keyframe progress 0→1 to play the effect; shrink makes splats evaporate instead of ghosting. A Directed region (box/sphere) limits it to one object. Chain several with different fields and regions for multiple effects on one capture.

How to

How-to

Put it after a SplatTransform on a splat capture.
Pick a field: sweep runs from the ▶ start point to the ⏹ end point (click them in the 3D viewer); noise, distance, axis and matte are the others.
Keyframe progress 0 → 1 to play the dissolve; shrink makes splats evaporate instead of ghosting.
A region limits it to one object.

Inputs

Input	What it takes
in	the image this node works on

Outputs

Output	Type
out	Scene

Parameters

Parameter	Type	Default	What it does
field	Choice	sweep	What orders the dissolve: `sweep` (start → end, the placed points), `noise` (everywhere, sized by noise_scale), `distance` (grows from the start point out to `radius`), `axis` (a wipe along X/Y/Z), `matte` (a 2D matte through `camera` decides). `sweepnoisedistanceaxismatte`
progress	Float	1.0	How far the dissolve has run, 0 = untouched to 1 = fully applied. THIS is the knob you keyframe to play the effect over the shot.
start_x	Float	0.0	The ▶ start point's X — click it in the 3D viewer with `place start`.
start_y	Float	0.0	The ▶ start point's Y — click it in the 3D viewer with `place start`.
start_z	Float	0.0	The ▶ start point's Z — click it in the 3D viewer with `place start`.
end_x	Float	0.0	The ⏹ end point's X — click it in the 3D viewer with `place end`.
end_y	Float	1.0	The ⏹ end point's Y — click it in the 3D viewer with `place end`.
end_z	Float	0.0	The ⏹ end point's Z — click it in the 3D viewer with `place end`.
shrink	Bool	false	Shrink splats as they fade instead of only fading opacity — they read as evaporating rather than ghosting.
noise_scale	Float	1.0	The noise field's feature size, world units — small is a fine sizzle, large is slow lobes.
seed	Int	1	The random pattern's starting point. Change it for a different pattern of the same character; keep it to reproduce a frame exactly.
radius	Float	1.0	Distance field: the dissolve runs 0 at the start point to 1 at this radius.
axis	Int	1	Axis field: which axis the wipe runs along — 0 = X, 1 = Y, 2 = Z.
axis_from	Float	0.0	Axis field: the coordinate where the wipe begins.
axis_to	Float	1.0	Axis field: the coordinate where the wipe ends.
camera	Text		The Camera3D the matte is projected through.
matte	Text		Matte field: the NAME of a 2D node whose alpha, seen through `camera`, decides which splats dissolve.
region	Choice	off	Limit the dissolve to a box or sphere so it hits one object, not the world — the difference between an effect and a directed effect. `offboxsphere`
region_min_x	Float	-1.0	Region box: the X of the near corner, world units.
region_min_y	Float	-1.0	Region box: the Y of the near corner, world units.
region_min_z	Float	-1.0	Region box: the Z of the near corner, world units.
region_max_x	Float	1.0	Region box: the X of the far corner, world units.
region_max_y	Float	1.0	Region box: the Y of the far corner, world units.
region_max_z	Float	1.0	Region box: the Z of the far corner, world units.
region_center_x	Float	0.0	Region sphere: the X of its centre, world units.
region_center_y	Float	0.0	Region sphere: the Y of its centre, world units.
region_center_z	Float	0.0	Region sphere: the Z of its centre, world units.
region_radius	Float	1.0	Region sphere: its radius, world units.
disabled	Bool	false	Bypass: the node passes its first input through untouched (D in the graph). The knobs keep their values for when it comes back.
label	Text		A note shown under the node in the graph — what this node is FOR. Never affects the render or the cache.
hide_input	Bool	false	Draw the node without its input wire — a tidy graph for a node whose source is obvious (a Dot, a viewer tap).