Input Parameters

Input Normal

Connect your bump pattern here if you wish to add flakes on top of it. Ignored if not connected.

RIB: normal inputNormal

Default: 0.0 0.0 0.0

Flake Randomness

This increases the distribution of flake normals, or their deviation from the base normal.

0.0	0.1	0.2	0.4	0.8

RIB: float flakeAmount

Default: 0.5

Flake Frequency

Changes the global size of the metal flake features.

10	20	40	80

RIB: float flakeFreq

Default: 57.3

Flake Density

Changes the number of metal flakes for a given area. Valid between 0 (no flakes) and 1 (all flakes).

1.0	0.5	0.25	0.125

RIB: float density

Default: 1.0

Flake Size

Changes the size of metal flakes. Pushing the value above one will create something akin to galvanized metal.

0.25	0.5	1.0	2.0

RIB: float size

Default: 1.0

Octaves

Number of octaves of noise to calculate flakes. Most of the time, 1 is enough.

1	2	3

RIB: int octaves

Default: 1

Jitter

Jitters the flake's position. 0.0 gives a grid-like organisation and 1.0 looks very random.

RIB: float jitter

Default: 0.75

Validate Normals

Make sure flakes normals are always in the same hemisphere as the original normal.

RIB: int validateNormals

Default: 0

Manifold

The manifold over which to apply the flakes.

The default (when there is no connected manifold) is P in object-space. This will work fine if your object is not deforming.

If your object is deforming :

1. Add a __Pref primvar to your geometry in its un-deformed state.
2. Create a PxrManifold3D node and connect it to the PxrFlakes node.
3. In the manifold's Pref field enter: __Pref
4. In the manifold's Coordinate System field enter: object

RIB: struct manifold

Output Parameters

resultN

The bumped normal.

resultA

The flakes' mask. This is a black and white mask that may allow you to tint flakes or change their roughness, for example.