_{The above settings are provided via the Attribute Editor for curves}

It is possible to render Maya curves with Arnold. An Arnold tab is appended to a Maya curve, which allows the user to define a shader (defaults to a hair shader), curve width, and the sample rate used to describe the curve.

• To render multiple hair curves using the same hair shader, it is far easier to create an override set. Tutorials on how to render curves can be found here.
• Currently, there is no checkbox to avoid SSS computations in point and curve primitives. However, the use of SSS is not supported with point and curve primitives and is therefore not recommended.
• It is not currently possible to map a 3d texture or project a texture to the Curve Width attribute.

Curve Collector

The Curve Collector gives you a simple way to translate several NURBS curves into one curve node (for increased performance). It allows you to have a single control for all of the curve's attributes (width, etc.), under one node.

An example scene using a Curve Collector node can be found [here].

_{Curves grouped under Curve Collector node}