Info:
Arnold for Softimage (or SItoA) provides a bridge to the Arnold renderer from within the standard Softimage interface.

Features

Seamless integration with Softimage shapes, lights (selective lights) passes and render region.
Full ICE support (particles, strand and geometry) with advanced instancing functionality.
Native Softimage render tree and shader support.
Stand-ins with realtime view representation.
Productivity boost: passes, overrides, UDIM style textures.
Full Alembic integration via Exocortex Crate.
Texturable geometric lights.
Deep EXR.