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PrismTOP

A kaleidoscopic prism: the input rendered through instanced, rotating polygon facets in up to three ring patterns, with softness, a chromatic distortion pass, fit and transform, and a dry/wet mix. An alternative for the Tile TOP and the Mirror TOP.

◧ Visual ◆ Patreon:Base OP Create menu entry

This tool unlocks with Patreon. It installs through the same picker as everything else and unlocks with the Patreon Base tier or higher, connected from inside TouchDesigner. Everything else in the toolkit stays free and MIT, and the membership is what keeps that work moving.

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Where it appears

Read off the registry hosts in the component, so this is where the tool puts itself in a default install; every one of these can be reordered or hidden from Hub.

What it is

A Tile TOP repeats, a Mirror TOP flips; a prism does both through glass. PrismTOP maps the input onto polygon facets, instances them in rings around the centre and renders the result, so the picture is repeated, mirrored and rotated at once, with soft edges between facets, a rotation that can swing on a sine, and a chromatic distortion pass that splits the colours the way a real prism does. Up to three ring patterns stack, each with its own instance count, radius, scale, phase and alpha, and the original sits underneath at its own opacity and scale. Dry / Wet mixes the whole thing against the input.

It is the alternative for the Tile TOP and the Mirror TOP: create either with the alternatives shortcut held and PrismTOP is offered in its place, wired into the same spot. It is also a member of the FNS operator family: pick it from the FNS tab of the OP Create dialog and it lands as one node.

Inputs and output

  • in1 (TOP): the image to refract.
  • out1 (TOP): the prism, mixed with the input by Dry/Wet.

Parameters

Custom

ControlType / defaultWhat it does
ResRes xyzw1920 The render resolution of the prism.
OperationOperand menuUnder How the facets are composited over the original image.
Options: Add, Atop, Average, Brightest, Burn Color, Burn Linear, Chroma Difference, Color and 38 more
Orig OpacOpacity number0 Opacity of the original image underneath the facets.
Orig ScaleMiddlescale number1 Scale of the original image underneath the facets.
FitFit menuFit Outside How the input fits the facets: fill, fit horizontally or vertically, best, outside, or native resolution.
Options: Fill, Fit Horizontal, Fit Vertical, Fit Best, Fit Outside, Native Resolution
TranslateT xyzw0 Moves the facet layer.
ScaleScale number1 Scales the facet layer.
RotateR number0 Rotates the facet layer, in degrees.
SidesSides number6 The number of sides of each facet's polygon.
SoftnessSoftness number0.09 Soft edge of each facet: 0 is a hard cut.
Rot Sin AmpRotsinamp number0 Size of a sine swing added to the rotation, in turns: 0 holds the rotation still.
Rot Sin PhaseRotsinphase number1165.75 Where the rotation swing sits in its cycle; animate it to swing the prism.
Dry/WetDrywet number1 Mixes the prism with the input: 0 is the input alone, 1 the full prism.

Patterns

ControlType / defaultWhat it does
PatternPattern sequence0 Up to three rings of facets, each with its own count, radius, scale, phase and alpha.
InstancesPattern0instances number6 How many facets sit in this ring.
RadiusPattern0radius number1 How far this ring sits from the centre.
Instance ScalePattern0amp number1 Size of this ring's facets.
PhasePattern0phase number0 Rotates this ring around the centre.
AlphaPattern0alpha number1 Opacity of this ring's facets.
InstancesPattern1instances number6 How many facets sit in this ring.
RadiusPattern1radius number1 How far this ring sits from the centre.
Instance ScalePattern1amp number1 Size of this ring's facets.
PhasePattern1phase number0 Rotates this ring around the centre.
AlphaPattern1alpha number1 Opacity of this ring's facets.
InstancesPattern2instances number6 How many facets sit in this ring.
RadiusPattern2radius number1 How far this ring sits from the centre.
Instance ScalePattern2amp number1 Size of this ring's facets.
PhasePattern2phase number0 Rotates this ring around the centre.
AlphaPattern2alpha number1 Opacity of this ring's facets.

Chroma

ControlType / defaultWhat it does
LayersLayers number3 How many colour layers the chromatic pass splits the image into.
ChromaticChromatic number0 How far the colour layers spread apart.
DistortionDistortion number0 How strongly the chromatic pass bends the image.

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