Selector material (selectbsdf)

Parameter	Type	Description	Flags
indices	texture	A texture of integer indices indicating which underlying BSDF is active as a function of space coordinates.	P
(Nested plugin)	bsdf	At least two nested BSDF instances that are selected based on selection indices.	P, ∂

This plugin implements a selector material, which uses a texture to select one of an arbitrary number of nested BSDF plugins. The index texture should take discrete integer values (even if it is internally stored using floating-point numbers).

The index texture should be initialized carefully when using a bitmap plugin:

• set the raw parameter to True to prevent spectral pre-processing;

• use a nearest filter type to avoid interpolation between pixels;

• it is more efficient to use a single-channel storage.