Unity PolySpatial Shader Graph Support

You can use the Unity Shader Graph 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 Shader Graph nodes have no analog in materialX. Within the Shader Graph 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 that it's 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
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 these 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 PolySpatial. Implements the splitlr function as described in the MaterialX Spec.
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