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Creates a VolumeShader; a shader that uses a ray-casting technique to display 3D volume datasets. The VolumeShader will only function correctly if it is applied to a MeshModelInstance representing a 3D box - more complex geometry is not supported.

Default label: "VolumeShader Builder"
Member of plug-in: Rendering
Catalogue path: Scene/Shaders

Inputs:
Volume data	CSIRO::DataAnalysis::Array3dScalar	The VolumeData to display.
Number of samples	int	The number of times each ray (cast through each pixel) should sample the dataset. A higher number of samples will result in a better quality image, at the cost of performance. The suggested value is at least half the dimensionality of the dataset (e.g. for a 256^3 dataset, samples should be at least 128.
Enable stochastic jittering	bool	If enabled, each ray cast by the shader will have its initial position offset by a random amount. This helps to remove "woodgrain" artifacts caused by under-sampling of the data.
Enable lighting	bool
Interpolation	bool
Alpha threshold	double	Minimum alpha value of samples required. When samples evaluate to an alpha value lower than this, they will not contribute to the shaded result. Be aware that for higher sample rates, a lower value for this may be required, as alpha contributions of individual samples will decrease.
Transfer function	CSIRO::DataAnalysis::TransferFunction2d	The TransferFunction controls how the scalar sampled values are converted into colors. The 2D transfer function allows both the value of each sample to be taken into account, as well as the gradient of the sample relative to its neighbours.
Limit the data to bounds	bool	If set to true (checked), values in the input data ("Volume data") will be limited to lie within the bounds specified by inputs "Lower bound" and "Upper bound". Any values less than "Lower bound" will be treated as if they have the value specified by "Lower bound", and similarly any values greater than "Upper bound" will be treated as if they have the value specified by "Upper bound".
Lower bound	double
Upper bound	double
Outputs:
Shader	CSIRO::Rendering::VolumeShader