Unity PolySpatial ShaderGraph Support

You can use the Unity ShaderGraph to create custom materials for visionOS. These will previewed in their compiled form within Unity, but converted to MaterialX for display in simulator and on device. While MaterialX is very expressive, some ShaderGraph nodes have no analog in materialX. Within the ShaderGraph editor, unsupported nodes will be indicated by the presence of a # symbol.

For technical, security, and privacy reasons, visionOS does not allow Metal-based shaders or other low level shading languages to run when using AR passthrough.

Shader Graph limitations in visionOS

The following tables show the current support status for Shader Graph nodes in PolySpatial for visionOS including a list of supported nodes and their various caveats.

If a node doesn't appear here it means is not currently supported Note that this list will be updated as we continue to add support for more nodes.

Artistic

Section Node Notes
Adjustment Contrast Colors may not be consistent.
Hue Colors may not be consistent.
Saturation Colors may not be consistent.
Blend Blend Supports Difference, Subtract, Burn, Dodge, Linear Dodge, Overlay, Screen, Overwrite, Negation, Multiply
Filter Dither - Requires simulation of Screen Space Position.
- Doesn't work at the moment due to bug with curvelookup node definitions.
Normal Normal Blend ✓ Supported
Normal From Height ✓ Supported
Normal Reconstruct Z ✓ Supported
Normal Strength ✓ Supported
Normal Unpack ✓ Supported
Utility Colorspace Conversion Not consistent - linear conversions not implemented.

Channel

Section Node Notes
Channel Combine ✓ Supported
Split ✓ Supported
Swizzle ✓ Supported

Input

Custom Interpolators are limited to only this specific/names types:

  • Color: Vector4

  • UV0: Vector2

  • UV1: Vector2

  • UserAttribute: Vector4

    Section Node Notes
    Basic Boolean ✓ Supported
    Color ✓ Supported
    Constant ✓ Supported
    Integer ✓ Supported
    Slider ✓ Supported
    Time ✓ Supported
    Float ✓ Supported
    Vector2 ✓ Supported
    Vector3 ✓ Supported
    Vector4 ✓ Supported
    Geometry Bitangent Vector Tangent and View space options are not standard.
    Normal Vector Tangent and View space options are not standard.
    Position Tangent and View space options are not standard.
    Screen Position ✓ Supported
    Tangent Vector Tangent and View space options are not standard.
    UV ✓ Supported
    Vertex Color ✓ Supported
    Vertex ID ✓ Supported
    Gradient Gradient ✓ Supported
    Sample Gradient ✓ Supported
    Lighting Main Light Direction ✓ Supported
    Matrix Matrix 3x3 Doesn't work (due to bug in constant matrix node definitions)
    Matrix 4x4 Doesn't work (due to bug in constant matrix node definitions)
    Matrix Construction ✓ Supported
    Transformation Matrix Tangent and View space options are not standard.
    Scene Camera Position and Direction outputs supported (non-standard).
    Object ✓ Supported
    Scene Depth Platform doesn't allow have access to the depth buffer, this is just the camera distance in either clip or view space.
    Screen ✓ Supported
    Texture Sample Texture 2D ✓ Supported
    Sample Texture 2D LOD ✓ Supported
    Sampler State MirrorOnce wrap mode not supported.
    Texture 2D Asset ✓ Supported
    Texture Size ✓ Supported

Math

Section Node Notes
Advanced Absolute ✓ Supported
Exponential ✓ Supported
Length ✓ Supported
Log ✓ Supported
Modulo ✓ Supported
Negate ✓ Supported
Normalize ✓ Supported
Basic Add ✓ Supported
Divide ✓ Supported
Multiply ✓ Supported
Power ✓ Supported
Square Root ✓ Supported
Subtract ✓ Supported
Interpolation Inverse Lerp ✓ Supported
Lerp ✓ Supported
Smoothstep ✓ Supported
Matrix Matrix Determinant Will flag as unsupported if using Matrix2.
Matrix Transpose Will flag as unsupported if using Matrix2.
Range Clamp ✓ Supported
Fraction ✓ Supported
Maximum ✓ Supported
Minimum ✓ Supported
One Minus ✓ Supported
Random Range ✓ Supported
Remap ✓ Supported
Saturate ✓ Supported
Round Ceiling ✓ Supported
Floor ✓ Supported
Round ✓ Supported
Sign ✓ Supported
Step ✓ Supported
Trigonometry Arccosine ✓ Supported
Arcsine ✓ Supported
Arctangent ✓ Supported
Arctangent2 ✓ Supported
Cosine ✓ Supported
Sine ✓ Supported
Tangent ✓ Supported
Vector Cross Product ✓ Supported
Distance ✓ Supported
Dot Product ✓ Supported
Fresnel Effect ✓ Supported
Reflection ✓ Supported
Rotate About Axis ✓ Supported
Transform Some spaces are simulated and not covered in tests.
Wave Triangle Wave ✓ Supported

Procedural

Section Node Notes
Noise Gradient Noise - Can't be certain that target platform noise functions will behave the same.
- Frequency is currently off (scale is mapped to amplitude rather than frequency).
Voronoi - Can't be certain that target platform noise functions will behave the same.
Shapes Ellipse ✓ Supported

Utility

Section Node Notes
Utility Preview ✓ Supported
Split LR Non-standard shader graph node specific to Quantum. Implements the splitlr function as described in the MaterialX spec: https://materialx.org/assets/MaterialX.v1.38.Spec.pdf
Logic Branch ✓ Supported
Comparison ✓ Supported
Or ✓ Supported

UV

Section Node Notes
UV Flipbook ✓ Supported
Rotate Only Degrees are supported.
Tiling and Offset ✓ Supported
Triplanar ✓ Supported