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Cavity / Curvature

VFX Loom 1.1.0 reference for the Cavity / Curvature node.

Material processing.cavity
The Cavity / Curvature node on the VFX Loom graph canvas.
Fig. 1 The Cavity / Curvature node in its resting, collapsed state on the VFX Loom graph canvas.

Overview

Extracts concave and convex cavity detail from a height image.

Material processing node. Compares neighbouring height samples to create a cavity/curvature mask, with selectable polarity and edge policy.

Category
Material
Internal ID
processing.cavity
Version
Current audited reference

Inputs

InputTypeRequiredDefaultMeaning
height Image Required — See the overview for the node's documented behavior.

Properties

PropertyTypeDefaultAnimatableRange / optionsEffect
Mode Enum Both Not declared Concave · Convex · Both Selects the mode behavior; each option changes the operation described in the overview.
Radius Scalar .0078125 Not declared Hard .0005..0.25 · UI range: soft · Step .0005 Local control documented by the production node behavior.
Strength Scalar 1 Yes Hard 0..4 · UI range: soft · Step .01 Animatable control; changing it over time varies the node response.
Edges Enum Clamp Not declared Clamp · Repeat · Mirror · Black Selects the edges behavior; each option changes the operation described in the overview.

Outputs

OutputTypeMeaning
mask Image The production node output described by the overview.

Usage

In practice

  • Connect a height image and choose Concave, Convex, or Both to extract cavity detail.
  • Adjust Radius and Strength before sending the mask to Colorize, Mask, or a Material Output channel.

Examples

These examples show Cavity / Curvature in supplied VFX Loom graph setups. Each graph link opens the corresponding node reference; the explanation below the media is specific to this node's role in that setup.

Material surface maps

A compact Material graph turns procedural noise into colour, roughness, normal, and cavity inputs for Material Output.

CoordinateNoiseDistortionColorizeMaskMaterial Output
CoordinateNoiseRoughnessMaterial Output
NoiseNormal From HeightMaterial Output
NoiseCavity / CurvatureColor AdjustMask
VFX Loom Material graph showing procedural coordinate and noise branches feeding Colorize, Roughness, Normal From Height, Cavity / Curvature, Mask, and Material Output.
Fig. 2A Material surface-map graph with a textured 3D preview.

How Cavity / Curvature contributes

Cavity / Curvature extracts local height detail as a mask for the material graph.

Notes / limitations

  • Cavity / Curvature is a Material processing node; Edges controls how neighbouring height samples are read outside the image.
  • Normal From Height Converts a height image into an encoded tangent-space normal image.
  • Mesh Curvature Bakes convex and concave edge information from a mesh into a UV-space mask.
  • Material Output Collects the optional surface maps of a Material project.