Nodes · Fathom

FathomPlace

Fathomv1core

Overview

Put an element into the shot in depth: click where it stands (the green foot in the viewer) and give its real height, and it is scaled by true perspective, sits on the plate's surface, and carries its own depth - so in a FathomMerge whatever of the plate is nearer hides it, with no roto. It arrives already in the shot's air and focus (match) and casts a shadow onto the plate (shadow). Wire the element into element and an analysed Fathom into plate.

How to

How-to

Wire the element into element and an analysed Fathom into plate.
Click where the element stands (the green foot in the viewer) and set its real height; it is scaled by true perspective and stands on the plate.
Choose *follow track* to pin the foot to a 2D track as the camera moves.
Turn on match (the plate's haze and focus at its depth) and shadow (a contact shadow on the plate), then merge in a FathomMerge. See fathom.

Inputs

Input	What it takes
element	—
plate	the original plate, for measurement

Outputs

Output	Type
out	Image

Parameters

Parameter	Type	Default	What it does
contact	Float2	[960.0, 900.0]	The plate pixel where the element stands. Drag the green foot in the viewer: the element slides along the plate's surface, rescaling and re-depthing as it goes. Keyframe it, or link it to a Tracker.
height	Float	1.8	The element's real height (world units, e.g. 1.8 for a person): the height of its alpha, or of its frame when it has none.
orientation	Choice	upright	upright: a card facing the camera, standing on the surface. ground: a card lying on the surface, foreshortened (a puddle, a decal, a shadow). `uprightground`
match	Bool	true	Put the element in the plate's air and focus at its own depth (haze and defocus from the knobs below; ⚒ Fit look from plate sets them).
airlight	Color	[0.0, 0.0, 0.0, 1.0]	The haze's colour: what the air adds as distance grows (Koschmieder's A). Fit from plate measures it from the plate's far pixels.
beta	Color	[0.0, 0.0, 0.0, 1.0]	How fast the haze thickens with distance, per channel (per world unit). 0 = a clear day: nothing changes.
haze	Float	1.0	A multiplier on beta: 1 = the plate's own air, 0 = none.
focus_distance	Float	0.0	The plate's focus distance (world units). 0 = no defocus. Fit from plate measures it; an Unreal shot can use its camera's.
coc_scale	Float	0.0	Circle-of-confusion scale: blur radius in pixels = coc_scale x \|1/focus - 1/depth\|.
defocus	Float	1.0	A multiplier on the defocus: 1 = the plate's own lens.
max_radius	Float	24.0	The largest blur radius (pixels) the defocus will use.
fog_base	Float	0.0	Height fog: the world height (usually the ground) where the fog is as dense as beta says.
fog_falloff	Float	0.0	Height fog: how many world units up the fog thins by a factor of e. 0 = the same fog at every height.
shadow	Bool	true	Cast a shadow onto the plate's own surface (carried to FathomMerge as `fathom_shadow`, which darkens the plate there).
light_azimuth	Float	135.0	The light's direction around the world's up axis (degrees). Drag the sun handle in the viewer.
light_elevation	Float	45.0	The light's height above the horizon (degrees): low light, long shadows.
shadow_density	Float	0.6	How dark the shadow is (0..1). Match it to one of the plate's own shadows.
shadow_softness	Float	2.0	The light's size (degrees): the penumbra widens with distance from the element.
contact_occlusion	Float	0.5	Darkening where the element meets the surface, the way a foot darkens the floor right under it.
contact_radius	Float	0.3	How far (world units) the contact darkening reaches.
bake_path	Text		The plate's Fathom bake, which carries the camera. Linked automatically when the plate's Fathom is analysed (↻ Link camera in the panel).
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).